Male sperm whales can reach up to 59 feet (18 meters) long and weigh up to 62.8 tons (57 metric tons). Females are smaller and max out at 36 feet (11 m) long, and weigh up to 16.5 tons (15 metric tons), according to the wildlife charity Whale and Dolphin Conservation (WDC).
A sperm whale’s head makes up about one-third of its entire body length. The whales have a distinctive, narrow lower jaw that contains all of their teeth. Sperm whale teeth are cone-shaped and can be up to 7.9 inches (20 centimeters) long and weigh 2.2 pounds (1 kilogram) each, according to the B.C. Cetacean Sightings Network, a research and conservation program in Canada.
