My regulet Crayfish kinda did that on black stbstrate. The top of the back was solid black and the sides were blue.Did you know that you can take an ordinary crayfish and put it in a tank with blue glass substrate, like marbles or decorative stones, and it will turn blue when it molts? Likewise, if you put an ordinary crayfish on red glass subtrate it will turn red. Just an interesting unknown fact. Bill
Did you know that you can take an ordinary crayfish and put it in a tank with blue glass substrate, like marbles or decorative stones, and it will turn blue when it molts? Likewise, if you put an ordinary crayfish on red glass subtrate it will turn red. Just an interesting unknown fact. Bill