In the deep sea, critters tend become either dwarfs or giants. This is because of food limitation - small animals require less food, and very large animals are more efficient. The giant squid is the most famous example of gigantism, but the giant isopod is much more near and dear to my heart. Isopods are essentially roly-poly bugs. In the ocean, they’re usually bug-sized - a centimeter or so long. But the deep sea they become MONSTERS a foot long. See them live and in actions in this deep-sea feeding frenzy. (or see them pink and cute in this Questionable Content webcomic! I really really want that t-shirt.)