Researchers have captured remarkable footage of a massive sea creature during a recent expedition. The discovery highlights the biodiversity of the deep sea and the impact of pollution on marine ecosystems.
Buenos Aires – A scientific expedition along the Argentinian coast has yielded an extraordinary discovery: video of a gigantic deep-sea creature. Although sightings of large marine life are not unheard of, researchers were able to document a rare phantom jellyfish, also known as a giant jellyfish (Stygiomedusa gigantea), during their work aboard the research vessel “Falkor.”
The remarkable jellyfish was observed at a depth of 250 meters. It is known for its impressive size, with a bell reaching up to one meter in diameter and four arms extending up to 10 meters long. Unlike many jellyfish, it lacks stinging cells, instead using its arms to capture prey such as plankton and small fish.
Researchers film gigantic sea creature in “bus-sized” proportions
The Schmidt Ocean Institute shared that scientists were even able to capture video of the massive jellyfish, described as being “the size of a school bus.”

During the voyage from Buenos Aires to Tierra del Fuego, researchers also discovered several coral reefs and potentially 28 new species, including worms, snails, and sea anemones. The expedition also revealed a significant amount of marine debris, including fishing nets, plastic bags, and a remarkably well-preserved VHS cassette with Koranic inscriptions. Scientists noted this highlights the lasting impact of plastic pollution on the oceans.
About the Schmidt Ocean Institute:
The Schmidt Ocean Institute is a private, non-profit foundation dedicated to advancing ocean exploration and research to understand and protect the health of the planet, according to its website. Founded in 2009, the institute is headquartered in Palo Alto, California.
“We have collected an unprecedented number of chemical, physical, and biological samples that will help us understand the connections within our waters,” said Melisa Fernández Severini of the Argentinian Institute of Oceanography. “These samples offer a unique opportunity to understand not only how extraordinary these extreme ecosystems are, but also how vulnerable they may be.”
The value of such research was recently demonstrated by another discovery: Chinese researchers recently solved a millennia-old mystery about our oceans. (Source: Schmidt Ocean Institute, dpa)