Two days ago I bought what I was told were a pair of electric blue ram, the girl I spoke to in the shop seemed knowledgable but I don’t know if the guy who got them out of the tank in the shop got the right ones. One is constantly chasing the other round the tank and I noticed today the one has a bit missing in the middle of its dorsal fin but I’m not sure if it was like that when I put them in my tank on Friday. I have tried to show in pictures. Can anyone help tell me what sex they are and what is going on with the ones dorsal fin. Tia.