Your brain only weighs about 3 pounds, but a sperm whale's brain can weigh up to 17 pounds. But humans do have much bigger brains proportionally-speaking: grey matter occupies 2 percent of our body weight and a meager. So maybe we should just call it a draw. Join the club.
The head contains a spermaceti organ whose function is not entirely known. The sperm whale has the largest of mammalian brains, both in proportion to its body and in sheer mass approximately 9 kg. Their blowhole is S-shaped and positioned on the left side of the head. There are functional teeth on each side of the lower jaws, but the upper teeth are few, weak and nonfunctional.
Sperm whales roam the deep waters of all the oceans, though they seldom approach polar ice fields and are most common in temperate and tropical latitudes. They have also be seen occasionally near coastlines in the Gulf of Mexico, where they were once quite common. Sperm whales swim through deep waters to depths of 2 miles, apparently limited in depth only by the time it takes to swim down and back to the surface.
The Sperm Whale is the largest of all toothed whales, and many people immediately think of the story of Moby Dick when they see one. It is well known for the grayish color that it features. The unique body design also offers a very large head with rows of sharp teeth.