Whale watchers in Madeira captured the astonishing moment orcas took down the deep-diving marine mammal. The predatory behavior had never been documented in the region.

Some say they got this name because sailors noticed their ability to dispatch enormous whales and dubbed them ‘whale killers’ ...

Where it lives: Tropical and temperate waters around the world. What it eats: Deep-sea squid, octopuses, crustaceans and fish. Dwarf sperm whales have an unusual way to protect themselves if they come ...