I just caught this bluegill last week at the lake and hes about 5-6 in long and is in a 75 gallon tank by himself with just a rusty crayfish to eat the leftovers that he might leave behind and also with plenty of places to hide. the first day he was ancy and hid when i came near the tank. the second day he learned when i came over he was gettin fed something and would come up to the top of the water and wait for the food to hit. before that worm would hit the water he would have it in his mouth and suck that thing down like it was nothing. it got to the point where i could hold the worm in my hand in the water and he would dig through my hand to get to it. I fed him a cricket, some wax worms.. pretty much anything i could get ahold of. well now he has like really flaky skin show in the picture there, and isnt eating like he use to.