*sigh*
I really don't like talking about the piranha.
He actually passed away last week. I haven't figured out how to change my signature.
But to answer your question about whether or not they make good pets: No. They're like oscars, only dumber (as in, not very smart). They get quite large and are happiest in schools, which is very difficult unless you have a very large aquarium. They're not particularly nice to look at, and I think that, aside from serious aquarists, they only catch peoples' attention as pets because they're such a novelty and because they eat other fish.
So why do/did I have one?
My husband bought him before we got married... I sort of inherited him. When we moved to another state, I found out that keeping piranhas in our new state was illegal, so I tried to keep him on the downlow for awhile.
About two months ago his health started deteriorating. He was an old fish. He finally passed about a week ago.
-----
~Alika~
1.0.0 green iguanas
0.1.0 cockatiels
1.0.0 senegal parrots
0.1.0 blue-fronted amazons
0.0.1 red belly piranha