Just spent 2 hours trying to find which females have been shredding their fellow sisters fins. Discovered 2 males, just starting to sprout hiding in the turrets of the castle. Some of these are taking forever to mature. I thought I only had girls left in the juvie tank...
Just caught a 3rd. THe only thing that makes them stand out is their long ventrals, which they kept hidden by keeping them tucked up. I know their game now...