Dolphins are described as a marine cetacean mammal of the order cetacea. The term cetecean includes all 76 known species of whales, dolphins, and porpoises. Those more than 4 to 5 m (13 to 16 ft) long are generally referred to as whales whereas smaller species as known as dolphins or porpoises. Dolphins have a beak and produce sounds that humans can here.
Dolphins usually eat fish, squid, octopus, cuttlefish, crabs, lobsters, and shrimp. They are carnivores.