Marine Living

There are about 86 species of whales, dolphins and porpoises in the Order Cetacea, which is further divided into two sub-orders, the Odontocetes, or toothed whales and the Mysticetes, or baleen whales. Cetaceans can differ greatly in their appearance, distribution, and behavior. Learn about and see photos of featured cetacean species.

© Blue Ocean SocietyBlue whales are thought to be the largest animal ever to live on the Earth. They reach lengths up to about 100 feet and weights of an amazing 100-150 tons. Their skin is a beautiful gray-blue color, often with a mottling of light spots.

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