OK so my piranha was out in the open in my 75 gallon tank. When walked in my room he freaked out and rammed right into the glass, hard. He seems to be feeling fine but has piece of skin between it's nostrils that is barely hanging on showing some flesh, there are about 2 1/2 dozen other really small fish in the tank as well. I don't have another tank large enough to temporarily house him. The piranha is roughly 6-7 inches long or so, pretty stocky, and still has good color. What should I do, I might be able to get a pic upon request. The fish is not very photogenic tho.