Cetaceans are famous for their high intelligence, complex social behaviour, and the enormous size of some of the group's members. For example, the blue whale reaches a maximum confirmed length of 29.9 meters (98 feet) and a weight of 173 tonnes (190 short tons), making it the largest animal ever known to have existed.

2025年1月30日 · cetacean, (order Cetacea), any member of an entirely aquatic group of mammals commonly known as whales, dolphins, and porpoises. The ancient Greeks recognized that cetaceans breathe air, give birth to live young, produce milk, and have hair —all features of …

Cetacea is an infraorder that comprises the 94 species of whales, dolphins, and porpoises. It is divided into toothed whales (Odontoceti) and baleen whales (Mysticeti), which diverged from each other in the Eocene some 50 million years ago (mya).

2023年8月2日 · Cetaceans are fully aquatic creatures, ranging from relatively small, river-dwelling dolphins to the massive blue whale, which is the largest animal to have ever lived. They are found in oceans, seas, and even some rivers throughout the world.

Learn fun facts about these gentle giants, what conservation efforts are helping to protect them, ways you can be awhale champion and more. Marine mammals in the cetacean family include whales, dolphins and porpoises. These animals are completely aquatic, meaning they spend all of their time in the ocean and cannot survive on land.

2025年1月30日 · Cetacean - Marine Mammals, Aquatic Adaptations, Conservation: Cetaceans are carnivorous aquatic mammals distributed in all oceans and some river systems. All are social to some extent, and many exhibit epimeletic behavior.

2024年12月21日 · Cetacean - Marine Mammals, Evolution, Classification: Cetaceans are distant descendants of a group of poorly defined mammals known as condylarths. The first fossil cetacean, Pakicetus, is from the Early Eocene Epoch.

2024年12月23日 · Cetaceans are large aquatic mammals with streamlined bodies culminating in paddle-like tails called flukes. They are members of the infraorder Cetacea (under order Artiodactyla ) and are further subdivided into two parvorders: The baleen whales or Mysticeti (including the blue whale, the humpback whale, the bowhead whale, and others) and ...

Cetaceans are famous for their high intelligence, complex social behaviour, and the enormous size of some of the group's members. For example, the blue whale reaches a maximum confirmed length of 29.9 meters (98 feet) and a weight of 173 tonnes (190 short tons), making it the largest animal ever known to have existed.

Definition: An infraorder of aquatic mammals that includes whales, dolphins, and porpoises. Key characteristics are their fully aquatic lifestyle, streamlined body shape, often large size and exclusively carnivorous diet.