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There are close to 28,000 different types of fish in the world. Fish have one thing in common, they live in water. Fish are throughout the fresh and salt waters of the world. Some fish live in streams or lakes, others live in the deepest waters of the ocean. Some fish are very big, and some fish are very small. Some fish are very strange. Play the following videos to learn more about fish. Even better, take a look at all of our fish videos in our fish video collection.