Skipjack is right! And the secret to distinguish between
E. spectabile (orangethroat darter) and
E. caeruleum (rainbow darter) is the anal fin as Skipjack said. Spectabile have a one color anal fin (blue-green in this area) and Caeruleum have a two color anal fin (blue-green & orange).
The nape also is a bit different between the two but the anal fin is a dead giveaway.
Your turn Skipster
Teleost your always picking fish from my localities of study ...makes it hard to be fair and even
Poly, I'm always showing you the photos I take before I post anyway
I make it impossible for a few of you to participate!