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.
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Elusive prickly sharks spotted gathering at underwater mountain off Panama — but why remains a mysteryIt could also be linked to reproduction. The team checked the sharks' claspers — modified pelvic fins used in reproduction — to confirm that both male and female sharks were at the gatherings.
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