👉 Whales are marine mammals that belong to the family Mammalia. They have a streamlined body and small, pointed teeth. Whales are known for their unique ability to breathe underwater, which allows them to hunt prey without the need for land-based means of propulsion like boats or ships. Additionally, whales are important predators in many oceans and play a vital role in maintaining ecosystem health by consuming fish, squid, and other marine animals.