Cetacea - Wikipedia
Cetacea (/ s ɪ ˈ t eɪ ʃ ə /; from Latin cetus 'whale', from Ancient Greek κῆτος 'huge fish, sea monster') [3] is an infraorder of aquatic mammals belonging to the order Artiodactyla that includes whales, dolphins and porpoises.
What's the difference between dolphins and porpoises?
People use the terms dolphins, porpoises, and whales to describe marine mammals belonging to the order Cetacea (from the Greek work ketos, “large sea creature”), and often use them interchangeably. The orca, or killer whale, for example, is actually the largest member of …
What are the differences between whales, dolphins and porpoises?
Differences between a dolphin and a porpoise. The biggest difference is size, with all species of porpoise being that much smaller than their dolphin cousins. Porpoises don't have the pronounced beak that most, but not all dolphins have and they also have different shaped teeth. Porpoise teeth are spade-shaped whilst dolphins are conical.
List of cetaceans - Wikipedia
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).
Differences Between Whales, Dolpins and Porpoises - ThoughtCo
2019年2月23日 · While dolphins and porpoises are very similar and people often use the term interchangeably, scientists generally agree that there are four major differences between dolphins and porpoises: Dolphins have cone-shaped teeth while porpoises have flat …
Cetacean | Life Span, Evolution, & Characteristics | Britannica
2024年11月4日 · Cetacean, any member of an entirely aquatic group of mammals commonly known as whales, dolphins, and porpoises. Cetaceans are entirely carnivorous. Their ancestors moved their limbs in a vertical plane, and thus cetaceans use vertical strokes when they swim, instead of horizontal strokes like a crocodile or fish.
What is the Difference Between Whales, Dolphins and Porpoises?
2020年11月25日 · Just like the differences between the baleen and toothed whales, there are differences between dolphin and porpoise communication. Dolphins are very chatty, making a range of noises that are audible to the human ear. Porpoises, however, communicate at a higher frequency that we cannot hear, and less often than dolphins. Social Groups
Whales, Dolphins & Porpoises Portal | Britannica
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 mammals.
A Complete Guide to Whales, Dolphins And Porpoises
Whaleopedia is a science-based resource about the natural history of whales, dolphins, and porpoises. Presented by the co-authors of Smithsonian Book’s best-seller The World’s Whales: A Complete illustrated Guide, Whaleopedia also offers information about cetacean conservation and related ocean science news.
Whales, dolphins and porpoises - What's the difference?
Dolphins, porpoises, and whales all belong to a group of marine animals known as cetaceans. Like all mammals, cetaceans are warm-blooded, breathe air, and suckle their young. But how do you distinguish one from the other? The approximately 86 species of cetaceans in the world are placed in two main groups.