There are 33 different kinds of dolphins. Most dolphins live all over the world in oceans. Some dolphins live in fresh water. That kind of dolphin is called a Fresh Water Dolphin. The smallest dolphin is called Commer's Dolphins and the biggest dolphin is the Killer Whale.
Dolphins eat fish and squid.
Some dolphins eat killer whales, seals, sea lions, penguins, and other whales. When dolphins dive or go back under water they close their blowholes so water will not get in their lungs. Like whales dolphins have clear jelly-like stuff in their eyes that look like tears. A baby bottlenosed dolphin is born through the year. Sometimes bottlenosed dolphins whack fish with their tails and send them soaring through the air.