(Reading) book Mr. BIG to the Sharks

At the zoo, Mr. Pig sees seals and sea lions, zebras, and even a sea elephant. Surely, then, a sea pig must exist too? In the library, he finds an old, dusty book. It is called 'Rare Sea Animals'. And in the book, he reads: 'The sea pig is a rare sea animal. It lives in the dark deep sea.' So Mr. Pig builds a submarine, and he sets off on a journey...