The shell is up to 1.5 inches tall, and 1-1.5 inches wide. Rivest, B.R., and R. Vanderpool. The Chinese mystery snail, black snail, or trapdoor snail (Cipangopaludina chinensis), is a large freshwater snail with gills and an operculum, an aquatic gastropod mollusk in the family Viviparidae. The Adirondack Council views the snail die-off as evidence that Renovate is far more damaging to animal life in general than believed by regulators. The “mystery” of these snails comes from their life … The herbicide devastated the banded mysterysnail population, causing a die-off. Impacts on Natives: The present abundance and distribution of Viviparus georgianus (Banded mystery Snail) in the Chesapeake region is not known. The Bulletin of the American Malacological Union, Inc. 50:52-53. Impacts: Both snails can form dense aggregations. Funding provided by the National Sea Grant College Program, National Oceanic & Atmospheric Administration and the State of Wisconsin. Carlton, and C.L. Watson, T.W. Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted. Fuller. It is often the dominant member of the macrofauna in its trophic level, both in number and function (Browne, 1978). Wisconsin Sea Grant 2021 Great Lakes Champion Award, It competes with native snails for food and habitat. Smith, D. 2007. Gemberling. Accessed on 04/12/2018. 1993. About Banded Mystery Snails Chinese mystery snails and banded mystery snails are non-native snails that have been found in numerous Wisconsin lakes. During the warmer months, they're easy to find and collect. Jokinen, E.H., and J. Pondick. Vail, V.A. The banded mystery snail is native to Florida and the Gulf of Mexico. Additionally, zebra mussel … Because some populations of the banded mysterysnail are semelparous (dying off after one breeding event), this can create a large concentration of dead snails in habitats and leave behind significant shell debris (Dillon et al., 2006). Using allozyme data, Katoh and Foltz (1994) found that Viviparus georgianus is actually a species complex; speciation has occurred within the group in the southeastern United States due to the separation of populations by large rivers that act as barriers for dispersal. Various fish and bird species are known to feed on the snail (Eckblad and Shealy, 1972; Smith, 2007). Piles of dead snail shells litter beaches making them unpleasant, much like zebra mussels. EPA-600/3-80-068: 144 pp. Viviparus georgianus often lives at high densities, sometimes up to 864/m2 (Lee et al., 2002; Pace and Szuch, 1985). 2002; Rivest and Vanderpool, 1986). Bioremediation Journal 6(4):373-386. Mystery Snail Shell Size: In the display tank, a Mystery Snail shell size can be about two inches in diameter. Journal of Great Lakes Research 19(1):1-54. The stems are reddish-brown to whitish-pink. Variation in capsule albumen in the freshwater snail Viviparus georgianus. † Populations may not be currently present. References- Clench and Fuller 1965) Ecological Impacts. Seasonal reproductive patterns in 3 viviparid gastropods. Gainesville, Florida. Viviparus georgianus has been shown to significantly reduce survival of largemouth bass eggs in guarded nests both in the laboratory and in ponds, and may contribute to high incubation mortality seen in natural field settings (Eckblad and Shealy, 1972). The banded mysterysnail is native to North America, generally found in waterbodies of the southeastern and midwestern United States, from Central Florida up to northern Illinois, and throughout the eastern part of the Mississippi Drainage (Clench 1962). People also know them as mystery apple snails, spike topped snails, golden mystery snail or Pomocea australis. The freshwater snails (Mollusca: Gastropoda) of New York State. Pace, G.L., and E.J. It was first introduced into the Hudson River basin of New York in 1854 (Strayer, 1987), but the population failed. They prefer sandy bottom areas, however if a littoral benthic … have a "trap door" called dark bands on their Vincent, B. Shells of the banded mystery snail can be as big as 1.75 inches long and have a right handed opening. Havel, J.E., L.A. Bruckerhoff, M.A. Nonindigenous Aquatic Species Database. Clench, W.J., and S.L.H. American Malacological Bulletin 35(2):175-180. There is not a lot yet known about these species, but they seem to have a negative effect on native snail populations. Shealy, Jr. 1972. Bowles determined the little creatures to be banded mystery snails (Viviparus georgianus). The Nonindigenous Occurrences section of the NAS species profiles has a new structure. Freshwater Invertebrate Biology 1(4):2-17. They have also been found in Lake Ontario, Lake Erie, and Kawartha Lakes, Trent River drainages and the Crowe and Moira River watershed. 2017. Eurasian water-milfoil (Myriophyllum spicatum) Found in nearly 400 Wisconsin lakes, EWM is an emergent plant that usually extends 3 to 10 feet, but can reach as much as 33 feet in length. It is possible that some introduced populations could actually be V. viviparus, which is a European species that is indistinguishable from V. georgianus (Mills et al., 1993). It forms dense mats on the surface of water … Later introductions were likely made via release from aquaria (Mills et al., 1993), but a one study found that this species is very resistant to desiccation, making it very capable of being dispersed over land via boat or other means (Havel et al., 2014). Secor. This species is very similar to the European Viviparus viviparus. Large golf ball-size snails with "trapdoor" (operculum missing when dead) The New Zealand mudsnail can be found in the Welland canal and the Great Lakes, including, Lake Ontario, Erie, Superior and Michigan. … Breeding takes place in the spring (Pace and Szuch, 1985). That was also the verdict from EDDMapS, the Early Detection and Distribution Mapping System, to which the person who posted on Facebook sent photos for confirmation. Some banded mystery snails are released from home aquariums, and others are transported by boats and equipment. 1977. This relatively small size allows them to be included in both small and large tanks. DNA barcoding of the banded mystery snail, Viviparus georgianus in the Adirondacks with quantification of parasitic infection in the species. They mostly live in lakes, ponds and rivers that have mud bottoms. The group is sexually dimorphic with females growing larger and faster than males, and reproductive females usually larger than 16 mm (Browne, 1978; Buckley, 1986). How does it spread? The Banded mystery snail is smaller than the Chinese mystery snail at 0.75 to 1.75 inches long and has 0-4 dark red spiral bands on its shell. Environmental Research Laboratory, Office of Research and Development, U. S. Environmental Protection Agency, Duluth, Minnesota 55804. Dillon, R.T., Jr., B.T. Young mystery snails are born as fully formed snails that seem to appear–mysteriously–from nowhere. Strayer, D. 1987. Observations on brood production in three viviparid gastropods. A study of the gastropods of Conesus Lake, Livingston County, New York. Star Tribune. Banded mystery snails reduced nutrient concentrations in high‐nutrient conditions more than other invasive species, but the reduced nutrients did not affect algal abundance. Three distinct species were found to be in the Georgia-Florida drainages, each grouping by drainage: V. georgianus formed a western group in the Choctawhatchee and Apalachicola River Drainages, V. limi formed a central group in the Ochlockonee River Drainage and southwestern Georgia, while V. goodrichi was found to be present in the most eastern rivers extending into the Florida Peninsula. Aspects of the feeding habits of Viviparus georgianus. A guide to freshwater mollusks of the Laurentian Great Lakes with special emphasis on the genus Pisidium. The earliest introduction of this species to the Hudson River drainage was made by an amateur conchologist who purposefully released around 200 of these snails simultaneously into the river in the 1850s (Jokinen, 1992; Mills et al., 1993). The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. Mystery Snail Appearance Scientifically known as Pomacea bridgesii, mystery snails have as many names as they have colours. American Zoologist 26(4):41A. A catalogue of the Viviparidae of North America with notes on the distribution of Viviparus georgianus. The species complex has a very variable shell morphology, and the shell bands are sometimes absent … … Lee, L.E.J., J. Stassen, A. McDonald, C. Culshaw, A.D. Venosa, and K. Lee. Olive-green shell with 4-5 whorls with distinct sutures, 4 reddish bands circle the shell (sometimes visible only from the inside), Ridges and “hairs” with hooked ends along the lip of the shell. Identification: Viviparus georgianus is a freshwater prosobranch (gills in front of heart) snail species complex with a thin and smooth shell, yellow-green in color with a straight outer lip, often with four distinctive brown bands present on the body whorl (Clench, 1962; Mackie et al., 1980). Banded mystery snails are small animals with a coiled spiral shell. This invasive species is suspected to harm native snails and lab studies found it may prey on fish larvae, reducing survival rates. 2006. 1994. It is a popular aquarium snail that’s been released in Minnesota. Malacological Review 20:1-68. Why is the banded mystery snail a problem? Fecundity ranges from  4-81 young per female, but on average, is closer to 11 young per female (Jokinen, 1992; Vail, 1978). This species grazes on diatom clusters found on silt and mud substrates, but may require the ingestion of some grit to break down algae (Duch, 1976). The banded mystery snail may prey on fish embryos. Genetic subdivision and morphological variation in a freshwater snail species complex formerly referred to as Viviparus georgianus (Lea). This species is considered established in the waterbodies in which it introduced. In 2007, over 3,000 scaup and coots died in a Northern Wisconsin lake as a result of ingesting the infected, non-native snails, with many more birds unable to fly because of the infection. Mills, E.L., J.H. Paired invasive species did not affect the survival or biomass of other invasive species. It is being provided to meet the need for timely best science. Young mystery snails are born as fully formed snails that seem to appear–mysteriously–from nowhere. Maps. Names and dates are hyperlinked to their relevant specimen records. States Counties Points List Species Info. They will grow to about 2 inches in diameter at most. Because it is a filter-feeding detritivore, Viviparus georgianus is a bioindicator of sediment contamination by oil and fertilizer, because growth, survival and histology are significantly affected by ingestion of contaminated sediments (Browne, 1978; Lee et al., 2002). Mackie, G.L., D.S. 1980. They have an operculum (”trapdoor”) covering the opening, which is missing when the snail is dead and the shell is empty. Leach, J.T. One-year old snails are 12–17 mm; at 2 years, 17–21 mm; and at 3 years, 21–30 mm (Lee et al. Hydrobiologia 741(1):89-100. It is dioecious (distinctly male or female) and ovoviviparous, with females laying eggs singly in albumen-filled capsules and brooding them for 9-10 months; this species is one of very few gastropods to give birth to live young (Browne, 1978; Jokinen et al., 1982; Lee et al. 1985. Katoh, M., and D.W. Foltz. We highly recommend reviewing metadata files prior to interpreting these data. The mystery snail’s large size and hard operculum (a trap door cover which protects the soft Some snails may be smaller, or some a bit larger, but two inches around is probably most common. Wade, J.Q. Table 1. 1985. The Channeled apple snail has not yet been recorded in Ontario, but is found in southern parts of the United States. The historic range of the banded mystery snail (BMS) is the southeastern U.S., primarily in the Mississippi River system up to Illinois. Vail, V.A. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. 2002; Mackie et al., 1980). Biological Journal of the Linnean Society 53(1):73-90. Minneapolis, MN. They grow up to one and a half inches tall and are light brown with red/brown horizontal bands that follow the spiral of the shell. Banded Mystery Snail (Viviparus georgianus. Malacologia 17(1):7-98. Snails as biomonitors of oil-spill and bioremediation strategies. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables. Occasional Papers on Mollusks 2(32):385-412. [2020]. The banded mysterysnail and Chinese mystersnail are both distributed from the Niagara River, flowing into the Great Lakes. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. The list of references for all nonindigenous occurrences of Viviparus georgianus are found here. ... Wildlife - Snails, Slugs, and Mussels. CMS are originally from Asia. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information. 1978. Proceedings of the Rochester Academy of Science 15(3):206-212. A Mystery Snail is non-aggressive and docile by nature, liking a calm aquatic environment and peaceful … This species’ migration, which typically results in individuals burrowing under mud during the fall and winter months, has led to an underrepresentation of the species during sampling (Pace and Szuch, 1985). It is unclear whether the native range of this species includes the Tennessee River Drainage, but it is likely introduced to the drainage given the absence of the species from very extensive surveys from shell collectors in the area during mid-late 1800s (Clench 1962). The banded mystery snail is native to the southeastern part of the United States, from Florida and the Gulf of Mexico to the Mississippi River to Illinois. Transactions of the American Fisheries Society 101(4):734-738. Accessed [12/2/2020]. The species was historically absent from most of the Atlantic coast drainages, and is known to have become established in the northeastern and midwestern United States as far back as the early 1900’s due to intentional releases, many from the aquarium trade (Clench, 1962; Mills et al., 1993; Dillon et al., 2006). The species complex has a very variable shell morphology, and the shell bands are sometimes absent (Clench and Fuller, 1965), but, it always has an adextral (right-handed) shell with 3-5 inflated whorls separated by deeply indented incisions. Nutrient enrichment increased the biomass of zebra mussels and mystery snails, but not Asian clams. There is not a lot yet known about these species, however, it appears that they have a negative effect on native snail populations. They were brought to California as a food source, and spread to other parts of North America from there, likely as an aquarium release. This species is known to be the intermediate host for trematodes and has, as a result, been involved in spreading parasites to aquatic birds, resulting in large avian die-offs. The banded mystery snail is native to the southeastern part of the United States, from Florida and the Gulf of Mexico to the Mississippi River to Illinois. Jokinen, E.H., J. Guerette, and R.W. An exceptional stream population of the banded apple snail Viviparus georgianus in Michigan, USA. Most growth generally occurs when waters become warmer in spring and summer, although reduced growth continues in winter (Browne, 1978; Jokinen et al., 1982). Funkhouser, and A.R. References. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Sign up for our quarterly newsletter featuring Wisconsin Sea Grant research, education and outreach. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Individuals are generally found in waters with pH between 6.3 and 8.5. Mystery Snail Appearance: Blue, Black, Gold and Purple. Duch, T.M. The Chinese mystery snail has taken up residence in waterways all over the United States, including the Pacific coast, the Northeast's rivers, and the Great Lakes. For queries involving fish, please contact Matthew Neilson. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. Rare and endangered species: freshwater gastropods of southern New England. Additional species are likely within this complex (Katoh and Foltz 1994). Identification, occurrence and ecology of species. Banded mystery snails are non-native snails that are found in an increasing number of Wisconsin lakes. Zdeba. The Banded Mystery Snail Chinese mystery snails and banded mystery snails are non-native snails that have been found in numerous Wisconsin lakes. Banded Mystery Snail Eurasian Water-Milfoil Upper Eau Claire Lake: Chinese Mystery Snail Curly-Leaf Pondweed Rusty Crayfish. It was brought to California in 1892 as a food source, and found in Massachusetts in 1915 — likely an aquarium release. The freshwater gastropods of North America. 1962. Occasional Papers on Mollusks 2(27):261-287. Jokinen, E.H. 1992. Chinese mystery snail. Snails in this family give birth to live young, complete with shells. The Nautilus 90(1):7-10. The active ingredient, triclopyr, is designed to target just broad leafed plants including the invasive milfoil. This information is preliminary or provisional and is subject to revision. Accessed on 03/12/2013. And some of their most popular colours include black, golden, brown, and ivory variants. It is often present with soft, silty and/or rocky substrates, but is present in a variety of habitats, including sand and detritus bottoms (Duch, 1976; Browne, 1978). The shells come in solid, to banded, to a gradient color and the bright almost white head and foot color, add a pop of color. For queries involving invertebrates, contact Amy Benson. 2002). It's free and you can receive an electronic or print version. The Chinese mystery snails and the banded mystery snails are non-native snails that have been found in a number of Wisconsin lakes. Created on 11/06/2007. This species is found in freshwater low-flow lentic streams, lakes, and ponds. This allows them to be bioindicators of contamination by oil or fertilizers because when they eat the contaminated materials, it can effect their growth and survival. The snails grow to about the size of a golf ball, reproduce rapidly, and compete with imperiled native snails. 1981. Szuch. Studies of the gastropods of Conesus Lake, Livingston County, New York, USA II. 1979. Vasey. 1986. Étude du benthos d’eau douce dans le haut-estuaire du Saint-Laurent (Québec). It can serve as a host for parasites that can be transmitted to fish and other wildlife. Fish Hook and Spiny Waterfleas It inhabits shallow waters, often amongst macrophytes, in spring to fall, before moving out to deeper areas to overwinter away from shore (Jokinen et al., 1982; Lee et al., 2002; Wade, 1985a), where it will burrow under the substrate for a period of inactivity (Pace and Szuch, 1985). Banded mystery snails may invade largemouth bass nests and significantly increase the mortality rate of the eggs. Mystery Snail Behavior & Temperament. Viviparus georgianus is a freshwater prosobranch (gills in front of heart) snail species complex with a thin and smooth shell, yellow-green in color with a straight outer lip, often with four distinctive brown bands present on the body whorl (Clench, 1962; Mackie et al., 1980). banded applesnail, pondsnail, Vivipara contectoides. The bands may be hidden by algae or sediment. Viviparus georgianus (Banded Mystery Snail) is a an attractive and popular aquarium snail (Clench and Fuller 1965), but introduced populations appear to have no documented economic impacts. Ramshorn snail A Ramshorn’s whorled shell lays flat, unlike the protruding whorls of the Chinese Mystery Snail. The banded mystery snail (Viviparus georgianus) is one non-native invasive species that receives little attention. 1976. Where did the banded mystery snail come from? Females can brood more than one clutch of young at a time and the number of young in one brood is positively related to the size of the female (Vail, 1977). Stewart, and W.K Reeves. There is not a lot yet known about these species, however, it appears that they have a negative effect on native snail populations. Banded mystery snails choose sandy-bottomed areas of lakes, ponds and slow-moving rivers and streams. New York State Museum Bulletin 482:vi -112. Canadian Journal of Zoology 57(11):1271-2182. Horizontal brown bands on the shell are visible from outside or inside the shell. They are most common in areas of lakes that are experiencing littoral eutrophication and fully eutrophic lakes. In more open waters, fall migration begins earlier than in smaller lakes and ponds (Lee et al., 2002). Two types of mystery snails will be discussed here – Chinese mystery snails (CMS), and banded mystery snails (BMS). This species has been documented in high densities where present, and to be more successful in the north, further from its known native range (Dillon et al., 2006). Lea) Description: The banded mystery snail is a member of the family Viviparidae. Citation information: U.S. Geological Survey. Banded mystery snails are smaller than the Chinese mystery snail. banded mysterysnail Viviparus georgianus (I. Lea, 1834) This species is Native to certain parts of the United States but may be invasive to others. covering In the Severn Sound area, they are known to occur in Bass Lake, in Oro-Medonte. The shell opening is on the right when the shell is pointed up. 1976. The genus Viviparus (Viviparidae) in North America. This species is also similar in shell shape and distribution with Viviparus intertextus and Viviparus subpureus (K. Cummings, Illinois Natural History Survey, pers. The lifespan of the female banded mysterysnails is typically between 28–48 months, while males live between 18–36 months (Jokinen et al., 1982; Lee et al., 2002). This is because they feed on the diatom clusters found in mud substrates. Selected Images. More individuals were released in 1867, resulting in an established population in the Hudson Drainage (Clench,1962; Strayer, 1987). Viviparus georgianus is known to be a facultative, or even obligate, filter-feeding detritivore (Browne, 1978; Lee et al., 2002). 1982. 'Viviparus georgianus' ('Banded Mystery Snails)' in the southeastern United States appears to be a species complex. Species: mattea The Pale Banded Snail (Figuladra mattea) has, as the common name suggests, a pale, yellowish shell with many strong, dark brown spiral bands. How did it get its name? The genetic identities of some populations remain undetermined, such as those of the Altamaha, Mississippi and St. Lawrence River drainages, and are therefore named as part of the V. georgianus species complex (Katoh and Foltz 1994). The species is known as the Banded Mystery Snail and this was the first recorded sighting in the watershed to date. How did it get its name? The banded mystery snail is native to the southern United States and its introduction to this region can be traced back to 1867 when an amateur biologist released 200 of the snails into the Hudson River. Clench, W.J. Genetic and morphometric studies have established at least two new species, Viviparus limi (Ochlockonee Mystery Snail) and Viviparus goodrichi (Globose Mystery Snail), in FL and GA Atlantic drainages. Under public health guidelines to prevent the spread of the coronavirus, we are working remotely and are here to serve you virtually. Based on … Eckblad, J.W., and M.H. What habitat does it prefer? The historic range of the banded mystery snail (BMS) is the southeastern U.S., primarily in the Mississippi River system up to Illinois. Exotic species in the Great Lakes: a history of biotic crises and anthropogenic introductions. A later genetic study found populations introduced in New York to group with the western complex, Viviparus georginaus (David et al., 2017). Although their native … Wade, J.Q., and C.E. How did the Banded Mystery Snail find its way into the watershed? Ecology and zoogeography of the freshwater mollusks of the Hudson River Basin. (Duch, 1976; Wade and Vasey, 1976; Vincent, 1979; Jokinen and Pondick, 1981; Pace and Szuch, 1985; Jokinen, 1992; Lee et al., 2002). 11/6. Viviparus georgianus has been shown to significantly reduce survival of largemouth bass eggs in guarded nests both in the laboratory and in ponds, and may contribute to high incubation mortality seen in natural field settings (Eckblad and Shealy 1972). comm., July 24, 2018). Why is the banded mystery snail a problem? This event was followed by subsequent introductions from aquariums owners. That introduction failed to establish a foothold, but in 1867 a population did become established in the Erie Canal and Mohawk River. The natural history of an ovoviviparous snail Viviparus georgianus in a soft water eutrophic lake. Resistance to desiccation in aquatic invasive snails and implications for their overland dispersal. White, and T.W. Proceedings of the Rochester Academy of Science 13(1):17-22. It could have been introduced through contaminated bait buckets or boating equipment. David, A.A., Zhou, H., Lewis, A., Yhann, A., and S. Verra. Morningstar, C.R., Daniel, W.M., Larson, J., and Fusaro, A. Morningstar, C.R., Daniel, W.M., Larson, J., and Fusaro, A., 2020. There is not a lot yet known about these species, however, it appears that they have a negative effect on native snail populations. The most distinctive feature of the banded mystery snails (and where they get their name) are the red bands that run horizontally on the greenish-yellow colored shell. EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. The snails can grow to be 1.75 inches long and 1.5 inches wide, with anywhere from one to four red bands on the shell. It is usually absent from larger, faster-flowing rivers (Katoh and Foltz, 1994); however, it can survive conditions of high water velocity in the St. Lawrence River, and may even be better adapted than the introduced Bithynia tentaculata (mud bithynia) to such habitat (Vincent, 1979). Bulletin of the American Malacological Union, Inc. 43:90. It also has a dark brown patch behind the outer lip and on the umbilical region on the base of the shell. The color and pattern possibilities in these snails are almost endless. It is a popular aquarium snail that’s been released in Minnesota. 2014. Parasite has killed thousands of scaup. Predation on largemouth bass embryos by the pond snail. With a variable diet, it will readily consume a herbivorous diet of algae and diatoms, but will also consume fish eggs (Duch, 1976; Eckblad and Shealy, 1972; Jokinen et al., 1982; Lee et al. Where are mystery snails from and how did they get here? The maximum height is 45 mm (Jokinen, 1992). 1986. The Banded Mystery Snail is an indicator of pollution from excessive fertilizers as they are found in nutrient rich environments and will feed on chlorophyta (green algae), diatoms, decomposing mater and live plants. 1965. Since then, they have spread throughout southern Ontario. Buckley, D.E. Larger shells are not necessarily healthier snails. (Smith, 2007). In 1867, the Banded mystery snail made its way into the waterways of North America when it was released into the Hudson River. Mystery Snails. Kortmann. Some populations are known to reach sexual maturity within one or two years and reproduce iteroparously (more than once in life), while other populations have been known to breed semelparously (breed only once in life), not reaching sexual maturity until year three of life before dying (Dillon et al., 2006). Bioenergetics of age-related vs. size-related reproductive tactics in female Viviparus georgianus. Biological Journal of the Linnean Society 27(4):293-310. Nautilus 99(2-3):48-53. Native to parts of the Mississippi River basin, Georgia, and Florida, this species was first reported in New York in 1854 in the Erie Canal. The Japanese variety of this species is black and usually a dark green, moss-like alga covers the shell. 2002. Banded Mystery Snail Select Another Location: Total Locations: 539 Total Lakes and Rivers: 561 * Disclaimer: Aquatic invasive species (AIS) records are assigned statuses of "verified", "observed", or "no longer observed" based on AIS Status Guidance.