I realize the fish does look stressed. It is however the top fish in the tank. Very feisty and comes to the front when i come to the tank. He eats earthworms, krill, mysis shrimp, and silversides, but it is dark from when i got it, i got it specifically for that reason, i liked it being dark and in the tank i got it from it was the dominant fish. I would have to agree with female, i just wanted other input. thankyou.