A cetacean mammal is a marine mammal that belongs to the order Cetacea. These animals are known for their unique characteristics, such as the presence of blowholes on top of their heads and fluked tails. Some of the most common examples of cetacean mammals include whales, dolphins, and porpoises. Synonyms for cetacean mammals include sea mammals, sea creatures, aquatic mammals, and marine animals. These animals have fascinated humans for centuries due to their incredible size, intelligence, and beauty. Despite being of great significance to marine ecosystems, many species of cetacean mammals are currently threatened or endangered due to human activities such as hunting, pollution, and climate change.