Something I've been putting off for a while now, concept art on one of my oldest species from various pieces of canon that I've created over the years.

The Pol'Katyi are a fish-like species that appear in my Opscura canon and in a lot of my sci-fi, but in general I just reuse the hell out of them because they're cool looking and I have a thing for fish :D
Their colors vary based on their genetics, typically greens and blues (eg, the sea foam as seen up above). Males typically hover around lighter colors while females have darker colors. Female head-fins are also smaller than males.

Their abilities and background vary from canon to canon, I guess at some point I'll come up with a solid canon for each individual case.

I might update this description later with more info if I come up with anything ^^;