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The burbot (Lota lota), is the only freshwater member of the cod family, gadidae. It is most common in streams and lakes of North America and Europe above 40°N latitude. They are fairly common in Lake Erie but are also found in the other Great Lakes.

Burbot

The burbot (Lota lota), is the only freshwater member of the cod family, gadidae. It is most common…

<em>Unio radiatus</em>, a common species of freshwater clam, of New England ponds and streams.

Clam

Unio radiatus, a common species of freshwater clam, of New England ponds and streams.

Crayfish, crawfish, or crawdads are freshwater crustaceans resembling small lobsters, to which they are closely related. They breathe through feather-like gills and are found in bodies of water that do not freeze to the bottom; they are also mostly found in brooks and streams where there is fresh water running, and which have shelter against predators. Most crawfish cannot tolerate polluted water, although some species such as the invasive Procambarus clarkii are more hardy. Some crayfish have been found living as much as 3 m (10 feet) underground.

Crawfish

Crayfish, crawfish, or crawdads are freshwater crustaceans resembling small lobsters, to which they…

Estheria californica is a species of Branchiopod crustaceans most closely resembling the shrimp.

Estheria

Estheria californica is a species of Branchiopod crustaceans most closely resembling the shrimp.

The gourami or gouramies are a family, Osphronemidae, of freshwater perciform fishes. The fish are native to Asia, from Pakistan and India to the Malay Archipelago and north-easterly towards Korea. "Gouramies" is an example of a redundant plural, like "cherries" or "Pakistanis"; Gourami is already plural, in its original language. The most famous species of gourami is the "kissing gourami", who do literally lock their exaggerated lips to each other in social displays relating to mating, as a habit of aggression toward other fish of any species, and for seeking food.

Gourami

The gourami or gouramies are a family, Osphronemidae, of freshwater perciform fishes. The fish are native…

"In this foot each toe is provided with its swimming membrane; the membrane being closed when the foot is flexed, and expanded when the foot is extended."&mdash;Pettigrew, 1874

Foot of Grebe

"In this foot each toe is provided with its swimming membrane; the membrane being closed when the foot…

The Horned Grebe (Podiceps cornutus) is a freshwater diving bird in the Podicipedidae family of grebes.

Horned Grebe

The Horned Grebe (Podiceps cornutus) is a freshwater diving bird in the Podicipedidae family of grebes.

Gudgeon is a common name for a number of small freshwater fishes of the families Cyprinidae, Eleotridae or Ptereleotridae. Most gudgeons are elongate, bottom-dwelling fish, many of which live in rapids and other fast moving water.

Gudgeon

Gudgeon is a common name for a number of small freshwater fishes of the families Cyprinidae, Eleotridae…

A characteristic snail of freshwater ponds. Female on left, male on right.

Paludina Decisa

A characteristic snail of freshwater ponds. Female on left, male on right.

"One of the best and handsomest of the freshwater fishes of that quarter of the globe." &mdash; Goodrich, 1859

European Perch

"One of the best and handsomest of the freshwater fishes of that quarter of the globe." — Goodrich,…

The roach (Leuciscus rutilus) and the dace (Leuciscus leuciscus) are European freshwater fish of the Carp family.

Roach and Dace

The roach (Leuciscus rutilus) and the dace (Leuciscus leuciscus) are European freshwater fish of the…

A fresh water fish red in color.

American Brook Trout

A fresh water fish red in color.

"Trout is a term applied generally to various species of fishes belonging to the salmon family. The best-known species, and that which par excellence receives the name, is the common trout, a fish which inhabits clear and running streams. The average weight of the common trout is from three-fourths to one pound. "&mdash;(Charles Leonard-Stuart, 1911)

Common River Trout

"Trout is a term applied generally to various species of fishes belonging to the salmon family. The…

Sometimes referred to as the fresh-water terrapin, the wood-terrapin ranges from Canada to Pennsylvania.

Wood-terrapin

Sometimes referred to as the fresh-water terrapin, the wood-terrapin ranges from Canada to Pennsylvania.