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| caddisworm |
the wormlike larva of a caddisfly that lives in fresh water in an elongated case made of sand, plant debris, and the silk secreted by the larva after hatching. |
| coho |
a small ocean salmon, now often introduced into fresh water as a game fish; coho salmon; silver salmon. |
| eel |
any of numerous long, snakelike fishes of fresh water or ocean. |
| freshwater |
living or operating in fresh water or inland bodies of water only. [2/3 definitions] |
| grilse |
a young male salmon that has returned to fresh water for its first spawning. |
| isopod |
any of various crustaceans of land, sea, or fresh water that have seven pairs of legs and a flattish body. [1/2 definitions] |
| limnology |
the scientific study of bodies of fresh water, including lakes, ponds, rivers, streams, springs, and wetlands. |
| mullet |
any of several related food fish of both salt and fresh water in tropical and temperate zones, with a usu. gray, nearly cylindrical body. |
| mussel |
any of several bivalve mollusks that live in salt or fresh water. |
| natural resource |
a source of economic wealth and prosperity that derives from nature, such as fresh water, mineral deposits, timber, wildlife, and park land. |
| parr |
the young of certain fishes, esp. the salmon before it leaves fresh water. |
| pickerelweed |
a North American aquatic plant bearing arrow-shaped leaves and spikes of blue-violet flowers that grows in shallow fresh waters. |
| pipefish |
any of various elongated, bony-plated fishes found in marine or fresh waters that have tube-shaped snouts. |
| salmon |
any of various edible saltwater fishes with tender, pinkish flesh that are related to trout, inhabit waters in the north, and characteristically swim up streams to spawn in fresh water. [1/2 definitions] |
| sea lamprey |
a parasitic marine lamprey that spawns in fresh water, and that now occurs landlocked in the Great Lakes. |
| smolt |
a young salmon that has developed enough to migrate from fresh water to the sea. |
| solar pond |
a pond with a top layer of fresh water and a bottom layer of dense hot salty water, used to trap solar energy for use in heating or to generate electricity. |
| steelhead |
a rainbow trout that migrates to the sea before returning to spawn in fresh water. |
| Stentor |
any of several large, trumpet-shaped protozoans, found in stagnant fresh waters. [1/3 definitions] |
| stickleback |
any of various small fish with sharp spines on their backs, found mostly in northern fresh waters and sea inlets. |
| tetra |
any of several small brightly colored tropical fish that are common in fresh water aquariums. |
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