Marine mammals are just like any other mammal but they feed on prey in the water or even live in the water. Marine Mammals include:
-Sea Lions/ seals/ walruses
- Dolphins, whales, and porpoises
-Sea Otters
- Manatees and Dugongs
-Sea Lions/ seals/ walruses
- Dolphins, whales, and porpoises
-Sea Otters
- Manatees and Dugongs
Dolphins and Porpoises
Most dolphins eat fish and squid, and some dolphins feed at night. Dolphins that live closer to the coast, tend to eat fish and bottom-dwelling invertibrates, while off-coast dolphins eat fish and squid. They can eat 2-4 percent of their body weight each day!
Dolphin Species
http://www.seaworld.org/animal-info/info-books/bottlenose/diet.htm