The Amazon River dolphin, which is also known as the boto or pink river dolphin, is estimated to number in the tens of thousands, according to the World Wildlife Fund. However, the pink river dolphin is still classified ... More »

Pink dolphins live in the Amazon, Araguaia and Orinoco river systems in South America. The dolphins, also known as Amazon river dolphins, live in portions of the river systems that pass through Bolivia, Brazil, Columbia,... More »

The 42 known species of dolphins live in the waters of oceans and rivers all over the world. Dolphins are found everywhere, from shallow coastal waters to the deep of the open ocean, and they migrate to and from certain ... More »

The World Wildlife Fund considers sea lions an endangered species. This classification indicates that a species of animals has a high risk of total extinction in the wild. Conservation efforts concerned with endangered a... More »

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Dolphins are mammals found in the sea and are part of the toothed whale family. They are grey with backs that are darker than the rest of their bodies. More »

Dolphins hear when the sounds in the water bounce off the dolphin's jaw bone into the middle ear. Dolphins can hear far better than humans and their hearing is even better than that of dogs. More »

All dolphins have conical teeth that are used for biting and trapping prey, such as crustaceans and fish, but are not used for chewing. Dolphins swallow their prey whole. Dolphins fall into the odontoceti, or "toothed wh... More »

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