It’s about 5 inches it’s a wild caught it’s really hard to tell even in person here is a pic of the fish tonight it’s colors have changed from almost no speckles on tail fins and almost all white yellowish body to thisHow big is the fish? Can you post pics of the fish in its tank?
Rule of thumb for venting is oo = M, oO = F. Yours seems to be oo with a slightly triangulated vent. My "guess" would be male.
These fish are the hardest I’ve ever encountered on sexing them. Yea before about 2 years ago I had a 19 inch male umbee miss that fish wish I never had to rehome it.I really think it’s an adolescent male mate Though I have never kept them, I know umbees get huge, perhaps their adult colors come in a little later. A guy I know in Perth Australia had a pair in an 8’ tank, the male was 15” and an absolute beast. His girl was less than half his size. Interesting pair!
Good luck as you grow him out!
Definitely one of the hardest fish to sex imoI think it’s a female but they are notoriously hard to sex