I have 2 males, Jaws and Ace, and one female, Bella, each one has their own tank. for the past few days jaws has been sitting on a different shelf. Ace joined him there today. about an hour ago i sat the boys on either side of the female bowl.(better light) all of the sudden bella turned a really dark collor and vertical stripes started showing up when she looked at Ace...then she swam across the tank and saw Jaws...and whoop...she has horizontal stripes!...wow...this is reallly cool to watch but i am fixing to put a pice of paper between all bowls.