An orca helps herd a school of herring in the deep waters of the Andfjorden in Norway.
Orcas, or killer whales, are one of the more well-known creatures of the sea with their distinctly vivid black and white coloring, sleek dorsal fin, and four-inch-long teeth. Despite their name they are actually the largest member of the dolphin family. Orcas rank as one of the world's top predators.
They are impressive hunters, traveling in close pods of up to 40, and communicating with distinctive sounds. Their group tactics allow them to prey on a variety of animals such as seals, fish, other whales, and other small marine mammals.
Orcas can be found anywhere from the polar regions to the equator, in any ocean, but are known to frequent cold coastal waters.