What are mammals called that live in the ocean?

In the book the last dog why does Brock fool the scientists into thinking he and Brog have rabies? Do Yorkshire terrier fur need cut? How long will a dolphin be when it is gron up? What epoch did apes appear? Is clumping cat litter bad for cats? What countries can Hyenas be found? How can you make your legs strong? How do bats eat? How a camels mouth help it? Is ecowas really a toothless bulldog? What does it mean if your cat is makin a screeching noise? Where in the world camel live? Do human and platypus have relationships? Why do cat owners talk to their cats? What is a wide span of management? Where can one find feed readers? What is the superstition of a dog howling at night? How many black stripes does a average tiger have? Is flea shredder powder deadly to put on cat? How much can british bulldogs weigh?