Dolphins are aquatic mammals that live in both saltwater (oceans and seas) and freshwater (rivers and aquariums) around the world. They have soft skin, a long beak-like snout, and short, wide fins. Dolphins are blind and can only distinguish between day and night. They are born from their mother's womb tail-first and must quickly swim to the surface after birth to breathe. Baby dolphins nurse for about 1.5 years then eat fish, squid, and crustaceans. Dolphins use echolocation to locate prey from long distances and have over 100 sharp teeth. They swim using their tail and can leap from the water. Dolphins must