hey, ive noticed that my senagal bichirs tail is a bit messed up, the only way i can think of describing it is a notch. its sorta like his tail is a bump on one side and a ditch on the other. its been there since i got him back in november i just forgot to post it, so it didnt just appear. is there something wrong? it might not have anything to do with it but can it affect his growth? cause ive noticed that he doesnt grow very fast.(only about 1.5-2in. in 4 months)