Giant phantom jellyfish filmed in the deep sea off Argentina.

Researchers at the Schmidt Ocean Institute recorded a roughly 10‑metre-long giant phantom jellyfish about 830 feet below the surface off the Argentinian coast, and the species has been documented only around 100 times.

Researchers from the Schmidt Ocean Institute filmed a giant phantom jellyfish while their remotely operated vehicle descended to explore the Colorado‑Rawson submarine canyon wall off Argentina. The animal was recorded at about 830 feet below the surface. The footage shows a translucent, bell‑shaped body and four long "mouth arms" trailing above it. Scientists say the species is mostly found in the ocean’s twilight zone where light is limited. Observed details: - Filmed at about 830 feet deep off the Argentinian coast by a Schmidt Ocean Institute remotely operated vehicle during a canyon descent. - Estimated at roughly 10 metres long with a translucent, bell‑shaped body and four long "mouth arms." - The species is reported to occur from surface waters down to about 21,900 feet and is most common in the twilight zone. - First described in 1899 and documented only around 100 times, making sightings uncommon. - Suggested hunting methods include using its long arms to trap prey and clinging to subsea structures, but those behaviours have not been directly observed. - When brought to the surface, the animal’s silky frame reportedly breaks down into "gelatinous goo," so ROV observation is preferred to trawling. Summary: The new footage adds to a small number of records for this rarely seen species and provides fresh visual detail about its size and morphology. Undetermined at this time.