They don't always turn red, I think diet and enviroment is somewhat a factor there. Not sure at what age they would turn red given the right things to make them do so.
ive always heard they turn a uniform grey or brown but never red like that. perhaps those pics are of a different species? they also loose their high fin when larger.
ive always heard they turn a uniform grey or brown but never red like that. perhaps those pics are of a different species? they also loose their high fin when larger.