Springer Nature’s Journal of Ethology has just published a study on a threesome. Yes, that kind of threesome—and it’s being hailed as a win for marine conservation efforts.

That’s because the lovers in this particular trio are leopard sharks. Hugo Lassauce, a marine biologist from the University of the Sunshine Coast, filmed two males and one female of the endangered species mating in the wild in a first-of-its-kind video, shedding light on their natural reproductive behaviors.

“The Indo-Pacific Leopard shark ( Stegostoma tigrinum ), listed as endangered by the IUCN, has primarily been studied in captivity, with little information on its natural mating behaviors,” the researchers wrote in the study. “Here, we present the first documented observations of group copulation in free-liv

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