Ok you're missing the point here. Its OK if the piranha is eating the animal - what ever it may be, but when someone is actually enjoying the shredding of the animal during the feeding, then there is something wrong. ENJOYING is the key word.
atc_ben said:And we all know that wild piranhas would never, ever consider eating a fish, or any other mammal, that it couldn't swallow in one bite. Come on people! What do you think those huge incisors are for?! That's how piranhas feed! That's why they're called piranhas! It means tooth fish. Are you really gonna argue that it's only morally acceptable to feed piranhas feeders that are small enough for them to swallow whole? As if being eaten whole and being slowly disovled by stomach enzymes is a better death than being eaten piece by piece and slowly disolved. A small fish still dies, and a bigger fish still gets calories and protein. Get a grip on yourselves people.
If it makes you feel better, just pretend those piranhas were tearing apart a hatchling of some (obviously non-endangered) bird that fell from it's nest and into the Amazon River.
By the way, you have no idea what that person's reason is for owning piranhas, but out of sheer curiousity, what would be the "right" reason? I own fish so I can observe their behavior, and that includes watching them eat.