Hungry Koi?

Koi fish are lovely looking. This picture was shot in Orlando, in one of the Chinese restaurants we visited when we were there. The ponds that they had were not big, but filled with tons of koi fish and they looked aggressively hungry. I could be wrong, I do not know much about fish. We used to have koi ponds here in the complex where we live, but they are all gone. A while back we received a letter from the management requesting people to stop feeding them with their food, as the fish became sick. I, guess, rescue effort has failed, now the ponds are completely drained. I am looking forward to seeing they will do with them.