What Is a Fish?: Different Types of Fishes

The video tutorial explains the diversity of fish, highlighting over 30,000 species. It categorizes fish into groups based on characteristics: jawless fishes like lampreys, cartilaginous fishes such as sharks, and bony fishes. Jawless fishes have suction cup-like mouths, while cartilaginous fishes have skeletons made of cartilage. Bony fishes, the most diverse group, have skeletons made of bone and inhabit both freshwater and saltwater environments.

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