My black pirahna is about 5-6 inches now If I get him small feeders It takes him forever to catch them. So the they are being terrorized all week. If they make it 4 or 5 days I usually put them in my pond. I figure If they make it that long they deserve another chance?? He also eats chicken liversTheres no sense in buying goldfish that big, its just ignorant, when people HAVE THE CHOICE to buy goldfish that big, or smaller ones they can fit in their mouth once they get it, people like you choose the larger ones that have to get ripped up before they die for your entertainment. When I give mine goldfish they get it and it fits completely in their mouths so theres no ripping apart for me to laugh about, because obviously its entertaining to some people.