I was trying to think of animals with feeding styles comparable to piranha but I don't think they're out there. Many animals hunt in packs, but no animals kill and consume prey with razor like bites taking chunks off right off larger prey animals. Most fish swallow prey whole, save for maybe sharks, but even then they usually attack small prey devoured in a single attacks. Hunting dogs and wolves swarm prey as well but tear prey with their teeth rather than excising chunks with each bait. what you think? parallels in insect world maybe
. Haven't you ever watched them eat before? Gosh, get with it.