Cetacea (/ sɪˈteɪʃə /; from Latin cetus ' whale ', from Ancient Greek κῆτος (kêtos) ' huge fish, sea monster ') [3] is an infraorder of aquatic mammals belonging to the order Artiodactyla that includes whales, dolphins and porpoises.

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 …

2016年12月7日 · The meaning of CETACEAN is any of an order (Cetacea) of aquatic mostly marine mammals that includes the whales, dolphins, porpoises, and related forms and that have a torpedo-shaped nearly hairless body, paddle-shaped forelimbs but no hind limbs, one or two nares opening externally at the top of the head, and a horizontally flattened tail used ...

2023年8月2日 · What Is A Cetacean? A cetacean is a member of the infraorder Cetacea – a group of marine mammals that includes whales, dolphins, and porpoises. There are approximately 90 species of cetaceans, divided into two main groups, the parvorders Mysticeti (baleen whales) and Odontoceti (toothed whales).

Cetacean is the collective noun used to describe all 90 species of whales, dolphins and porpoises. The word cetacean has its origins in Latin (Cetus) referring to a large sea creature and Greek (Ketos) meaning whale or sea monster.

2024年12月23日 · Cetaceans are large aquatic mammals with streamlined bodies culminating in paddle-like tails called flukes.

Cetacea (/ sɪˈteɪʃə /; from Latin cetus ' whale ', from Ancient Greek κῆτος (kêtos) ' huge fish, sea monster ') is an infraorder of aquatic mammals belonging to the order Artiodactyla that includes whales, dolphins and porpoises.

2024年12月21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7月30日 · Cetacean animals are characterized by their anatomy, morphology, physiology and habitat. The main characteristics of cetaceans are: They exhibit an exceptionally wide range of body mass that influences oxygen storage and capacity utilization.

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.