21. Sperm Whale
The Sperm Whale is the largest of the toothed whales, with males weighing up to 90,000 pounds and measuring over 60 feet in length. Renowned for their massive heads and deep-diving abilities, these whales can plunge over 7,000 feet in search of squid. Found in oceans worldwide, Sperm Whales play a vital role in marine ecosystems, contributing to nutrient cycling through their feeding activities.