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You’re in the middle of the ocean at night… and suddenly, a glowing, nearly invisible creature drifts past you—long, trailing tentacles extending like ghostly threads into the darkness. This is what many call the “phantom jellyfish.” The term usually refers to a deep-sea species known as Stygiomedusa gigantea, one of the largest and most elusive jellyfish ever observed. Despite being discovered over a century ago, scientists have recorded only a limited number of sightings. Most of what we know comes from deep-sea submersibles and remotely operated vehicles exploring depths below 1,000 meters. Unlike typical jellyfish, this species lacks the stinging tentacles used for capturing prey. Instead, it has four long, ribbon-like oral arms that can extend over 10 meters. These structures function more like drifting nets, passively trapping small organisms such as plankton and fish larvae. This feeding strategy is an example of energy efficiency in extreme environments, where food is scarce and conservation of energy is critical for survival. The deep sea itself is a high-pressure, low-temperature biome with almost no sunlight. In these conditions, many organisms evolve transparency or bioluminescence. The phantom jellyfish appears almost invisible because its gelatinous body is composed of over 95% water, minimizing light reflection. This is a form of camouflage known as “optical invisibility,” reducing detection by predators. From a physiological perspective, its simple body plan is highly effective. Jellyfish lack a centralized brain and instead rely on a decentralized nerve net. This allows them to respond to environmental stimuli without expending the metabolic energy required for complex neural processing—an advantage in nutrient-poor ecosystems. If you’re interested in deep-sea mysteries like this, subscribe now, because the ocean still hides more unknown life than we’ve ever discovered. Another intriguing aspect is its role in the marine ecosystem. Even though sightings are rare, organisms like this contribute to carbon cycling. When deep-sea jellyfish die, their bodies sink, transporting carbon from the surface to the ocean floor—a process known as the “biological pump,” which plays a measurable role in regulating Earth’s climate. So the “phantom jellyfish” isn’t just a strange creature—it’s a reminder of how much of our planet remains unexplored, operating under biological rules very different from those on land. #oceandeep #ocean #jellyfish #biology #giganteamedusa #phantomjellyfish

Chrysaora colorata (commonly known as Purple-striped jellyfish) we encountered on our deco after diving wreck of Palawan, artificial reef near Redondo Beach. Too bad I didn't have anything in the frame to compare to get the scale but this jelly was massive.

What if you were just taking a walk on the beach and discovered a massive, never-before-seen creature? That's exactly what happened in Tasmania, revealing how much we still don't know about our own planet's oceans. In 2007, retired biology teacher Dr. Lisa-ann Gershwin was beachcombing after a storm when she found an enormous, gelatinous blob washed ashore. It was unlike anything she had ever seen, far exceeding the size of any recorded jellyfish. Her careful observation and reporting led to a groundbreaking scientific discovery. This video explores the incredible moment of finding this new species, now known as the Tasmanian Lion's Mane Jellyfish. We'll dive into what makes this creature so unique, how it remained hidden for so long, and the scientific impact of its discovery. This astonishing find proves that even in the 21st century, vast, unknown life forms exist in our oceans, and ordinary people can contribute significantly to scientific knowledge. It's a powerful reminder of Earth's unexplored mysteries and the importance of citizen science. If you're amazed by deep-sea wonders, new species, and unbelievable discoveries that expand our understanding of life, then this story is for you.

CSIRO scientists are working to classify a new species of giant jellyfish after one washed up on a beach in southern Tasmania. The 1.5 metre jellyfish was found by a family walking on a beach at Howden, south of Hobart, last month. There have been several reported in waters off the state and the research body has also captured specimens. CSIRO scientist Lisa-ann Gershwin told ABC Local Radio while the species has been seen before, it is technically unclassified and new to science. "It's a whopper. We do get large jellyfish and this one just happened to be this absolutely enormous specimen," she said. "I do hear from time to time people tell me 'we found this one that was really big', but this one really is, really big. "[We] finally got specimens this year of it, so it's new to science, but it's not a brand new thing completely out of left field. "It's one of these things that really makes us come face-to-face with the fact that there are things we don't know about out there in nature, particularly in the ocean." "I love that is was found by kids that they stumbled upon on this thing." Twelve-year-old Xavier Lim was with his family when it was spotted. "We were at the beach looking for shells and dad was like 'Whoa! Look at that'...I kind of touched it.. it was pretty cool," he said. Dr Gershwin has been working on jellyfish for 20 years and says it is probably the biggest the state's ever seen, and could rival interstate finds. "Generally the jellyfish tend to be bigger in the temperate regions rather than in the tropics, so certainly tropical jellyfish would tend to be smaller." "I've been in Tassie working with jellyfish for a long time here and I've seen a lot of big jellyfish but this one's really big." The jellyfish is not dangerous, but can sting. "If you touched it or whacked into when you were swimming it is very painful," Dr Gershwin said. "It's not life-threatening, but it will sting you, it will wake you up." Ice can be used to relieve pain from stings. Dr Gershwin says she has chosen a name for the species and is working to have it classified. CSIRO scientists are working to classify a new species of giant jellyfish after one washed up on a beach in southern Tasmania. The 1.5 metre jellyfish was found by a family walking on a beach at Howden, south of Hobart, last month. There have been several reported in waters off the state and the research body has also captured specimens. CSIRO scientist Lisa-ann Gershwin told ABC Local Radio while the species has been seen before, it is technically unclassified and new to science. "It's a whopper. We do get large jellyfish and this one just happened to be this absolutely enormous specimen," she said. "I do hear from time to time people tell me 'we found this one that was really big', but this one really is, really big. "[We] finally got specimens this year of it, so it's new to science, but it's not a brand new thing completely out of left field. "It's one of these things that really makes us come face-to-face with the fact that there are things we don't know about out there in nature, particularly in the ocean." "I love that is was found by kids that they stumbled upon on this thing." Twelve-year-old Xavier Lim was with his family when it was spotted. "We were at the beach looking for shells and dad was like 'Whoa! Look at that'...I kind of touched it.. it was pretty cool," he said. Dr Gershwin has been working on jellyfish for 20 years and says it is probably the biggest the state's ever seen, and could rival interstate finds. "Generally the jellyfish tend to be bigger in the temperate regions rather than in the tropics, so certainly tropical jellyfish would tend to be smaller." "I've been in Tassie working with jellyfish for a long time here and I've seen a lot of big jellyfish but this one's really big." The jellyfish is not dangerous, but can sting. "If you touched it or whacked into when you were swimming it is very painful," Dr Gershwin said. "It's not life-threatening, but it will sting you, it will wake you up." Ice can be used to relieve pain from stings. Dr Gershwin says she has chosen a name for the species and is working to have it classified. Click link to subscribe to Red Phoenix Channel : http://www.youtube.com/user/TheRedPhoenixOne?sub_confirmation=1 Click to view this channel for more videos : https://www.youtube.com/user/TheRedPhoenixOne

A giant jellyfish the size of a human has stunned a diver off the south-western coast of England.

Giant jellyfish sighting reports in Maine

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Giant jellyfish descend on the Sea of Japan, causing untold devastation to coastal villages and leaving a trail of destruction and human misery behind. Sounds like a great sci-fi flick. But it's not. It's real and it's a nightmare for Japanese fishermen. The massive sea creatures, called Nomura's jellyfish, can grow 6 feet in diameter and weigh more than 450 pounds. Scientists think they originate in the Yellow Sea and in Chinese waters. For the third year since 2005, ocean currents are transporting them into the Sea of Japan. Monty Williams, a marine biologist at Alabama's Dauphin Island Sea Lab, said the jellyfish grow to an enormous size as they are transported by ocean currents. He said they stay together in packs and as they drift northward, they get caught in fishermen's nets. The giant jellyfish are one of about 200 species of coastal jellyfish or large jellyfish that exist around the world. But Nomura's stands out because of its enormous size.