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The zebra mussel (Dreissena polymorpha) is a small freshwater mussel, an aquatic bivalve mollusk in the family Dreissenidae.The species originates from the lakes of southern Russia and Ukraine, [3] but has been accidentally introduced to numerous other areas and has become an invasive species in many countries worldwide.
The velum is a single circular structure that projects from between the valves, in front of the small foot. As in the gastropods, the veligers of bivalves may either feed on phytoplankton or survive off yolk retained from the egg. In plankton feeding veligers, the larva can undergo considerable growth.
The quagga mussel resembles the zebra mussel, just as its namesake (quagga) resembles the zebra. The quagga mussel shell can be distinguished from the zebra mussel shell because it is paler toward the end of the hinge. It is also slightly larger than the zebra mussel, about 20 mm (0.8 in) wide, roughly about the size of an adult human's thumbnail.
The Iowa Department of Natural Resources confirmed zebra mussels, an invasive species, were found in Saylorville Lake.
Mussel (/ ˈ m ʌ s ə l /) is the common name used for members of several families of bivalve molluscs, from saltwater and freshwater habitats. These groups have in common a shell whose outline is elongated and asymmetrical compared with other edible clams, which are often more or less rounded or oval.
The Brushy Creek Municipal Utility District said it's no longer worried about an aquatic invader that has taken over dozens of lakes across Texas.
Native Great Lakes mussel coated with zebra mussels. Another example of the migration of non-native species is Dreissena polymorpha, common name Zebra Mussel, originating in Western Asia. [5] They first appeared in North America in 1988 in Lake St Clair and have spread through the Great Lakes and other fresh waters.
The Dreissenidae are a family of small freshwater aquatic bivalve molluscs, commonly called mussels although not at all closely related to true mussels. The shells of these bivalves are shaped somewhat like those of true mussels, which they also resemble in attaching themselves to a hard substrate such as stone using a byssus; however, this group is more closely related to the venus clams ().