4. Sperm Whale
The sperm whale, also known as cachalot, is the largest whale with teeth. The largest individual ever measured was caught in the South Pacific in 1933 and it had over 78 feet (24 meters), although the jaw of the specimen currently in the Natural History Museum in London is believed to have belonged to an individual measuring 25.6 meters. The Guinness Records marks a captured specimen from back in 1950 which measured 20.7 meters in length.
The sperm whale commonly dives to depths of over 7,300 feet and communicates via clicking, which is also a form of echolocation.
