Sorry for the delayed response, I'm pretty busy, but the fish he is fighting with is a HAPLOCHROMIS SP. #44 “THICK SKIN” , i have 2, I'm actually getting ready to remove them from that tank, because they are insanely aggressive compared to the rest, so they will be temporarily in a 55 for now, they are so beautiful and I cant part with them, so they are getting a new setup!!