well since its a cray, and its a scavanger he usually gets the leftovers from the fish feedings...
but it varies I guess. I feed frozen blood worms, mysis shrimp, brine shrimp, various flake foods, but usually what I see him nab are the sinking stuff i use... sinking algae discs, the larger ones from hikari, tropical discs, and sinking carnivore pellets..
its usually rather amusing, I'll drop a few algae discs in the tank.. cory's, pleco, and sometimes the goldfish start eating it, then out of nowwhere he comes running across the bottom of the tank, scares half of them away, will clip a fin if they are too slow, grabs one, then runs back into his cave as fast as he can with the stolen goods...lmao