i think theyre a little fatter, and have more spiked fins, and a little more spotted, but i definately could be wrong. it looks more like whats sold as upside down cats here. what kind of alto is that..?
black congo calvus and the cat is always out in the open swimming and rarely see it upside down haha he does nudge the fish every once in awhile but nothing extreme but for the most part he stays swimming threw the rocks
prob some hybrid trying to decide to keep it or not