Identify please

[WhistlingBadger]

my Denisions are comfortable enough, that I get to watch nuptial dancing regularly in my highly flowing Hillstream 55 gallon tank, and while active, aren't swimming from end to end like they are confined in too small a space...

I'm finding that high flow is sort of a space multiplier. Surfing against the current does seem to give the fish a good place to put their energy.