guys i have an iridescent shark which is about 5 inches and hes a greedy fellow he loves hikari cichlid gold but ive noticed something that once they hit the 5 inch mark, it has happened to all the iridescent sharks that i have kept in the past all of them had have this pimple on their mouth, but i gradually fades, is it a disease or a sign that the fish being mature like in Oscars?
notice the red dot
notice the red dot