With adults reaching near 67 feet in length, the sperm whale is the largest toothed whale, the largest living toothed animal, and has the largest brain of any animal. Sperm whales are characterized by their light grey color, white waxy film that covers their heads, a thick body that tapers at the tail and their lack of a dorsal fin.
They can be found in all oceans and the Mediterranean Sea. Sperm whales feed primarily on squid but also octopus, a diverse range of fish and the mega-mouth shark. Little is known about how the animals mate, but a female Sperm whale’s gestation period is about 12-14 months and they give birth about every six years.