hi, just bought this guy a couple weeks ago. i dont have any experience with keyholes but he was all beat up in the tank so i had to rescue him. anyway, just wondering what sex it is, i know they are not the easiest to sex, but it is an adult so, here ya go
IMO they are nearly impossible to sex. Females usually end up growing fairly long, pointed dorsal and anal fins like the males, so that method won't work the way it does in some cichlids. All six of mine looked pretty much the same. The females sometimes stayed a little smaller, but not by much.