Ichthyology (from Greek: ἰχθυ, ikhthu, "fish"; and λόγος, logos, "knowledge") is the branch of zoology devoted to the study of fish. This includes skeletal fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha).
Since the publication of the 10th edition of "Systema Naturae" the major work by Linnaeus in 1758, (now considered the starting point of zoological nomenclature), 58 915 fish species have been described up to November 2009.
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