Clasper

The claspers of a spotted wobbegong shark (Orectolobus maculatus)
The claspers of a young spinner shark (Carcharhinus brevipinna)

In biology, a clasper is a male anatomical structure found in some groups of animals, used in mating.

Male semen into the female's cloaca during mating. The act of mating in some fish including sharks usually includes one of the claspers raised to allow water into the siphon through a specific orifice. The clasper is then inserted into the cloaca, where it opens like an umbrella to anchor its position. The siphon then begins to contract expelling water and sperm.[1][2] Male chimaeras have cephalic claspers (tenacula) on their heads, which are thought to aid in holding the female during mating.

In entomology, it is a structure in male insects that is used to hold the female during copulation.

See also

References

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