Five Facts - Fish

The video presents five fascinating facts about fish. It discusses the vast number of undiscovered fish species in the deep ocean, highlighting their unique adaptations like bioluminescence. The swim bladder's role in helping fish float is explained, contrasting with sharks that must swim constantly. Fish sleep patterns are explored, noting their lack of eyelids. The video also covers fish that can live in both freshwater and saltwater, such as salmon. Finally, it describes the lungfish's ability to breathe air due to its unique adaptation to dry climates.

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