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snail darter
(redirected from Percina tanasi)

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snail darter, a small, rare fish, Percina tanasi, discovered by a zoologist who was snorkeling in the Little Tennessee River upstream from the projected Tellico Dam. Dam opponents fought successfully to include the darter on the Endangered Species List in 1975 (see endangered species endangered species, any plant or animal species whose ability to survive and reproduce has been jeopardized by human activities. In 1999 the U.S. government, in accordance with the U.S.
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), and the dam was halted. In 1978, the Supreme Court sided with environmentalists, but Congress declared the fish nonendangered and the Tellico was built. Snail darters are classified in the phylum Chordata Chordata , phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate
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, subphylum Vertebrata, class Osteichthyes, order Percomorphi, family Percidae.

snail darter

Rare species (Percina tanasi) of darter that originally was found only in the Little Tennessee River in the southeastern U.S. It became the subject of a legal controversy in 1978, when its status as an endangered species delayed for two years the construction of Tellico Dam. The situation was resolved when the fish was successfully introduced into the Hiwassee River.



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Quite oblivious to the human turmoil around them, the remnant population of roughly 25,000 endangered Percina tanasi darted about amongst the stones on the broad shoals near Coytee Springs in the Little Tennessee River, a strategic ecological presence at the center of an impending conflict over how the natural river would be developed.
The Little Fish and the Habitat Alteration that Endangered It The snail darter, Percina tanasi, is a small fish in the perch family.
 
 
 
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