Dreissena: alternatives and connections

A species or genus in one country closely related to a species of the same genus, or a genus of the same group, in another: such speci…

A genus of bivalve shells, allied to the oyster, so called from their unequal valves, of which the lower is perforated for attachment.

A genus of crustaceans, containing the crawfish of fresh-water lobster of Europe, and allied species of western North America. See Cra…

A dipterous insect of the family (Estridae, of many different species, some of which are particularly troublesome to domestic animals,…

A fresh-water fish of many species, of the genus Uranidea, esp. U. gobio of Europe, and U. Richardsoni of the United States; -- called…

A bivalve mollusk of many kinds, especially those that are edible; as, the long clam (Mya arenaria), the quahog or round clam (Venus m…

A bivalve mollusk, with radiating ribs, of the genus Cardium, especially C. edule, used in Europe for food; -- sometimes applied to si…

A genus of univalve shells, abundant in tropical seas. Some species, as Columbella mercatoria, were formerly used as shell money.

Any crustacean of the family Astacidae, resembling the lobster, but smaller, and found in fresh waters. Crawfishes are esteemed very d…

A genus of small, bivalve, fresh-water Crustacea, belonging to the Ostracoda; also, a member of this genus.

Any worm of the genus Lumbricus and allied genera, found in damp soil. One of the largest and most abundant species in Europe and Amer…

Any fish of the genus Etheostoma and related genera, allied to the perches; -- also called darter. The etheostomoids are small and oft…

Lately produced, gathered, or prepared for market; not stale; not dried or preserved; not wilted, faded, or tainted; in good condition…

Of, pertaining to, or living in, water not salt; as, fresh-water geological deposits; a fresh-water fish; fresh-water mussels.

One of two or more species of American fresh-water fishes of the family Centrarchidae, esp. Chaenobryttus antistius, of Lake Michigan…

A genus of marine univalve shells; the harp shells; -- so called from the form of the shells, and their ornamental ribs.

Any species or marine hydroids, of the genus Hydractinia and allied genera. These hydroids form, by their rootstalks, a firm, chitinou…

An extinct genus of large, fossil, bivalve shells,allied to the mussels. The genus is characteristic of the Cretaceous period.