Percopsidae
Percopsidae (troutperch; superorder Paracanthopterygii, order Percopsiformes) A small family of freshwater fish, of scientific interest because they are claimed to form a link between the soft-rayed and spiny-rayed fish. Percopsis omiscomaycus (troutperch), 20 cm, is widely distributed in N. America. There are two species.
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heterocercal tail
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RAY, JOHN
natural history.
Ray may have acquired his interest in science during his early years at Black Notley, where his father, Roger Ra…
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Percopsidae