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Channel darter
The channel darter (''Percina copelandi'') is a species of fish in the perch family, Percidae, and the subfamily Etheostomatinae. This species is listed as threatened by the Canadian Species at Risk Act (SARA).
==Description==
This is a small-sized fish between 34 and 61 mm in total length; some specimens as large as 72 mm. It is light sand or olive in colour with brown speckles on its back. A dark spot or bar may be present below the eye and extending onto the snout 8 to 18 brown oblong blotches along the lateral line linked by a thin brown line. The spawning male turns dusky with a blackish head. The fins are clear or lightly speckled and the first spiny dorsal fin usually has 11 rays.
The channel darter most resembles the river darter (''Percina shumardi''). It can be distinguished from the johnny darter (''Etheostoma nigrum'') and the tessellated darter (''E. olmstedi''), which have only one anal spine instead of two. It differs from the blackside darter (''P. maculata'') in usually having 11 rays on the first spiny dorsal fin instead of 13 to 14.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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