sexual hooklet

sexual hooklet
one of a series of tiny spines or hooks along the anteriormost rays of the ventral and anal fins of most male Characidae. May also be present on the dorsal and caudal fins. They are used as a coupling device in mating

Dictionary of ichthyology. 2009.

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  • hooklet — a small hook, e.g. sexual hooklets in Characidae …   Dictionary of ichthyology

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