Cetaceans are a diverse group of marine mammals that include whales, dolphins, and porpoises. These animals are adapted to life in the water, with streamlined bodies and specialized respiratory systems that allow them to breathe air through blowholes. They are known for their intelligence, complex social behaviors, and sophisticated communication skills, such as echolocation. Cetaceans are found in oceans worldwide and play significant roles in marine ecosystems. Some species, like the humpback whale, are well-known for their acrobatic displays and melodic songs.