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Mysterious black eggs with embryos found at the bottom of the ocean (photo)

Bylim Olena

Mysterious black eggs with embryos found at the bottom of the ocean (photo)
Black eggs in the depths of the Pacific Ocean. Source: Kakui and Tsuyuki, Biology Letters

During a study in the depths of the Pacific Ocean, researchers from the University of Tokyo discovered eggs of deep-sea flatworms, the first concrete confirmation of their existence at a depth of more than 6,000 meters.

Marine researcher Yasunori Kano, operating an underwater vehicle, spotted the mysterious black spheres on the Pacific floor. After extracting some samples, it was found that these spheres contained leathery shells, or "cocoons," with flatworms developing inside, sciencealert writes.

Researchers Keiichi Kakui and Aoi Tsuyuki from Hokkaido University found that the embryos of these worms belong to an undescribed species of platyhelminths closely related to shallow-water life forms. This discovery provides a unique opportunity to study the early stages of life of deep-sea flatworms and their evolutionary adaptations to life at great depths.

Mysterious black eggs with embryos found at the bottom of the ocean (photo)
Content of black eggs. Source: Kakui and Tsuyuki, Biology Letters

During the examination, it was found that each cocoon contained three to seven embryos that developed inside a milky fluid that may be a yolk. This suggests that the worms, like their shallow-water relatives, are hermaphrodites and can produce eggs.

Given that this creature was found at a depth of more than 6000 meters, this discovery is an important step in understanding the deep-sea ecosystem and the distribution of diverse life forms at great depths.

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