Cetacean

Cetaceans are a group of marine mammals that include whales, dolphins, and porpoises. They are fully aquatic, warm-blooded, and breathe air through lungs, coming to the surface via blowholes. Cetaceans are highly intelligent, displaying complex behaviors, communication skills, and social structures. They evolved from land mammals millions of years ago and are characterized by streamlined bodies, dorsal fins, and powerful tails called flukes that aid in swimming. They play vital roles in ocean ecosystems, often serving as indicators of marine health. Despite their adaptations for aquatic life, cetaceans are mammals and possess features like hair and live births.