During a scientific expedition off the coast of Argentina, an international team documented a giant ghost jellyfish, Stygiomedusa gigantea. The images, captured at about 250 meters deep on board the R/V Falkor vessel of the Schmidt Ocean Institute, show a creature of impressive size, comparable to that of a school bus. The video shows the jellyfish moving slowly through the deep waters of the South Atlantic, revealing a ghostly, almost monumental shape that fascinates scientists and the public.
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The surprising dimensions
The animal’s bell can reach one meter in diameter, while the four long arms reach up to 10 meters in length, giving it a majestic and disturbing appearance. Despite its imposing size, Stygiomedusa gigantea does not have stinging tentacles, but uses its arms to capture prey and feed itself. The combination of size and slow movement makes this jellyfish one of the most extraordinary encounters documented in deep-sea ecosystems, a rare creature still little known to science.
Behavior and habitat
Experts point out that Stygiomedusa gigantea is a notoriously elusive animal, rarely spotted due to the depths at which it lives. Its presence off Argentina offers new opportunities to study the dynamics of deep ocean ecosystems and the behavior of little-observed species. The images captured by the researchers allow us to closely observe details such as the transparency of the bell and the way its arms extend into the water, providing clues to its hunting method and movement.
The scientific significance of the discovery
This sighting represents an important contribution to the knowledge of the biodiversity of the deep sea. Stygiomedusa gigantea, despite being one of the largest jellyfish on the planet, still remains largely unknown. The visual documentation helps scientists better understand how such rare species interact with their environment and fit into the ocean food chain. The discovery was made public by the Schmidt Ocean Institute, which released the video underlining the importance of studying and protecting deep marine ecosystems.
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