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The ocean, the original home of Earth's animal life, has creatures of every size, shape, and type. How many animals are in the ocean? How many species do they represent? Scientists estimate that 3.5 trillion fish, marine mammals, and other invertebrates call one of the world's five oceans home. To date, researchers have identified about 230,000 marine species but believe there could be as many as two million.

Each of the questions in this quiz features an anagram of an animal that resides in the sea, ocean, or along the coastline. Your job is to figure out what creature it is, and type out your answer in the box under each question. If you get stuck at any point, click on the "I give up" button to reveal the answer and move on to the next question. And because you will have to type in your answer, spelling does matter. Good luck!