Fish, Definition, Species, Classification, & Facts

Fish, any of approximately 34,000 species of vertebrate animals (phylum Chordata) found in the fresh and salt waters of the world. Living species range from the primitive jawless lampreys and hagfishes through the cartilaginous sharks, skates, and rays to the abundant and diverse bony fishes.

Animal Classification Keys: Lesson for Kids - Video & Lesson Transcript

introduces students to the world of aquatic life and teaches them about three different classes of fish. Students will discover many

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