Instead of penises, male sharks use two claspers to get sperm into females. And about 15 shark species can have young without males, with females self-fertilizing eggs. This is known as ...

A parasitic fish called a lamprey sometimes attaches itself near a male shark’s claspers, or reproductive organs. This can make it more difficult for scientists to identify an individual’s sex.

"Our knowledge of adult whale sharks, particularly their ... Shortly afterwards, a male (presumed to be an adult due to its calcified claspers and 8.5-meter size) appeared and began following ...