What are claspers? Which group of fishes possess them?
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Some fishes have specialized structures that aid in sperm transfer. Male elasmobranch, for example, have modified pelvic fins called clappers. During copulation, the male inserts a clasped into the cloaca of a female. Sperm travel along groove of the clasped. Fertilization occurs in the female’s reproductive tract and results in higher proportion of eggs being fertilized.
Most cartilaginous fishes have this structure.
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