- Nearly 40 species of dolphins swim the waters of the world. Most live in shallow areas of tropical and temperate oceans, and five species live in rivers.
- Dolphins are carnivores. Fish, squid and crustaceans are included in their list of prey. A 260-pound dolphin eats about 33 pounds of fish a day.
- Known for their playful behavior, dolphins are highly intelligent. They are as smart as apes, and the evolution of their larger brains is surprisingly similar to humans.
- Dolphins are part of the family of whales that includes orcas and pilot whales. Killer whales are actually dolphins.
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