There are different marine mammals in the world oceans e.g. whales, dolphins, sea otters and seals. Seals are divided into 3 families, True seals (Phocidae), Walruses (Odobenidae) and Eared seals (Otariidae). There are a lot of differences between the families but the main ones are that the Walrus have large whiskers and tusks, Eared seals READ MORE