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  1. Fish | Definition, Species, Classification, & Facts | Britannica

  2. Fish - Wikipedia

  3. Fish – Definition, Examples, Characteristics - Science Notes and …

  4. 5 Groups of Vertebrates – Characteristics and Examples

  5. 12.8: Fish Structure and Function - Biology LibreTexts

  6. Vertebrate - Wikipedia

  7. What is a Fish? | manoa.hawaii.edu/ExploringOurFluidEarth

  8. Vertebrate - The Definitive Guide - Biology Dictionary

  9. Fish species and physical features | Britannica

  10. 29.3: Fishes - Biology LibreTexts