After watching that vid, I miss my Red-Bellied Pirahna (RIP) that I had back in WA. I got him from a friend of a friend who said it was a baby Silver Dollar. I got him when he was barely half an inch. Once other fishes in the tank started missing & he got bigger & bigger, I started realizing I didn't exactly get what I was told. He got along with one fish only. An Albino Tiger Oscar.