Not sure why you're not getting a response from the rest of the more intelligent ones. I'm new at all of this and my Tilapia's are smaller then yours. But from my limited knowledge that's a male, because they have two openings and the female only have one. At least that is what the guy that sold me my fish said.

I'll tag your post, maybe we will get a conformation on Male or Female.

Check out my main post "Pipe Siphon by Apollo" and "Fire Pit ... AP" to see my AP build.

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I HAVE NOT FAILED. I'VE JUST FOUND 10,000 WAYS THAT WON'T WORK. Thomas A Edison