How old are all your fish, are they in the same tank, and what size tank/s?greenterra;1394334; said:A lot of the males will develop a nauchal hump with age.This guy is about 13" and is tolerant of smaller fish but not fish his own size anymore..He is washed out a bit now with colors as he is getting older but definately a character.They usually do all right in communities and definately add color.