Orcas have been in the news for quite some time, and now these killer whales ... hunt in packs and eat anything, from fish to sharks. Recently, Orcas were spotted hunting whale sharks in a pod.

Odontocetes, or whales with teeth, use echolocation to hunt their food with sound rather than sight. They eat squid, octopus, fish, prawns, crustaceans and other marine mammals, sucking in their ...