Holocephali

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Holocephali (class Chondrichthyes) A group, often ranked as a subclass, of peculiar, shark-like fish, including both living and fossil species. They are characterized by a cartilaginous body, large eyes, large, wing-like pectoral fins, a whip-like tail, a scaleless skin, and a gill cover over the common gill chamber. See also CHIMAERIFORMES.