My little brother's fancy guppy died last night, and hes very upset. He had beautiful yellow fins. He had him in a 5 gallon with 5 other guppies and 2 corys (i know its overstocked, but no one in my family listens to my fish advice). Anyway, he seemed to have a tiff with another of the guppies in the tank, but he didnt seem injured when i looked at him when i took him out of the tank. Also, my brother might have over feed them, but wouldnt the other ones have died too? (i just found out they were feeding them 2-3 times a day, thats way to much, no?) anyway, were just trying to solve this mystery.