Found mostly in waters with moderate flows over a sand, gravel and cobble mix of benthic substrate within the lower sections of riffles or upper parts of pools . Migratory behaviour is undetermined .
Dorsal spines (total): 11 - 13; Dorsal soft rays (total): 11 - 15; Anal soft rays: 11 - 13. Distinguished from populations of Crystallaria asprella of the Gulf Coast, Mississippi River and Wabash River by a combination of the following features: gape width larger approximately equal to or exceeding the inter-pelvic fin base width; a preorbital blotch distinctly separate from the anterior orbital rim; pelvic fins distinctly falcate in both sexes; cheek scale rows reduced (modally 2); opercle scale rows reduced (modally 2); number of midlateral blotches higher (modally 13); number of anal-fin rays lower (modally 13); number of dorsal-fin spines lower (modally 12); and scales below the lateral line higher (modally 11) .: elongated.
Behavioural data for Diamond darter is currently being reviewed.
Diet information for Diamond darter is currently being compiled.
Reproduction data for Diamond darter is currently being compiled.
Freshwater; benthopelagic. Temperate North America: Cumberland, Elk, Green and Muskingum river drainages of the Ohio River basin, USA.
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