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Harlequin
darter, Etheostoma
histrio
The harlequin darter
is a small fish that is critically imperiled in Indiana while it has a
distribution across the Midwest and Southern U.S. it is generally
uncommon. This darter resides
in freshwater creeks and medium sized rivers.
In Indiana, the harlequin darter will most likely be found in
riffles with a coarse gravel bottom.
Major threats for this darter and others are pollution and habitat
modification.
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