Dolphins are part of the family of toothed whales. They are one of the intelligent marine mammals. Dolphins are found almost in every big sea. They are carnivorous animals and like eating fishes, squids, crabs, crustaceans and others. They have impressive eyesight along with excellent hearing ability. They are well-known for their playful behaviour and are a part of attraction at many places. They can live up to 40 years or more. Their main habitat includes temperate coastal waters, bays and harbours.