Why is my Indo Datnoid this color? This is probably the most of the black lines I have seen of this guy. He can go almost all dark when freaked out but most of the time he looks like this. I have never seen a full bar go black on it. He is the king of the tank though. 3 other datnoids 1 just a little smaller than him that is almost always all dark unless he has a piece of food in his mouth, and 2 others that are the smallest ones and one of them always looks stable unless this one is pestering him and the other small one looks almost just like this one. I have read a bunch on the stability but most seem to just mention striped stable or dark unstable. But can't find pictures of one that looks like this. I am confused.