Woah! 6k! How big is the fish? It looked like 12" or smaller..
If I kept mine, I could buy a brand new lexus now xD
I'd say ST, because of the full wrapped tail.
As for overall features, 1) it's too small to determine if the fish will have a high back or not (like a peacock bass hump), 2) body shape - as many fishermen and even myself still believe that's how to distinguish between a male & a female datnoid (no scientific proof) slender elongated body as male and round body as female.
Also, by looking back at my old photo (it hurts to see), I have CT that had round body shape too.