Ichthyology covers a diverse range of body forms and sizes.

Ichthyology is the branch of zoology devoted to the study of fish, including bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). According to FishBase, 33,400 species of fish had been described as of October 2016, with approximately 250 new species described each year.[1][citation needed]

  1. ^ FishBase: October 2016 Update. Retrieved 7 October 2016.

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