A remotely operated submarine exploring Argentina's deep waters has captured footage of a giant phantom jellyfish—a creature so rarely seen that fewer than 120 have been documented since 1899. Its arms stretch longer than a camper van, making it one of the ocean's most elusive giants.
The sighting happened during a recent expedition along Argentina's coast, between Buenos Aires and Tierra del Fuego. Dr. María Emilia Bravo, chief scientist for the mission, described the moment with a mixture of wonder and caution. "There was a mixture of excitement and disbelief," she told The New York Times. "Its ethereal and delicate presence in such an extreme environment was deeply surprising."
The phantom jellyfish isn't the only discovery. The expedition unveiled 28 species entirely new to science, exploring waters that have remained largely unmapped. The team also found what appears to be Argentina's first documented deep-water whale fall—a critical moment in ocean ecology when a whale carcass sinks to the seafloor and becomes a food source for countless deep-sea creatures.
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Start Your News DetoxPerhaps most significant was the discovery of the largest known Bathelia candida coral reef in the world. This stony cold-water coral structure, roughly the size of Vatican City, creates a habitat for fish, crustaceans, octopuses, and species yet to be named. "We were not expecting to see this level of biodiversity in the Argentine deep sea," Bravo said.
Image via ROV SuBastian / Schmidt Ocean Institute
This expedition is part of a larger pattern. The Schmidt Ocean Institute has now completed over 100 deep-sea missions, with their recent work in Argentinian waters yielding extraordinary results. Just months ago, a livestreamed expedition of the Mar del Plata Canyon drew 17.5 million viewers and discovered 40 new species. Two months later, their 100th expedition found 30 more species off Uruguay's coast, plus hundreds of others never before recorded in those waters.
Dr. Jyotika Virmani, executive director of the Schmidt Ocean Institute, frames what these discoveries mean: "With every expedition to the deep sea, we find the ocean is full of life—as much as we see on land, and perhaps more because the ocean contains 98 percent of the living space on this planet." Each mission reveals how much remains unknown about the world beneath the waves, and how much is still waiting to be understood.
