An underwater videographer recently captured stunning footage of a lion’s mane jellyfish during a night dive in the Salish Sea. This vast body of water lies between Washington state and British Columbia, and it’s home to incredible marine life.
“After spotting a long tentacle drifting above, I followed it for more than a minute,” said John Roney, the videographer, on his Instagram. “Finally, I came across this massive jellyfish.”
His video showcases the jellyfish gliding through the dark waters, with delicate particles of “marine snow” drifting behind it. Roney is especially drawn to the jellyfish’s striking colors, noting its “deep, vibrant orange, purple, and crimson hues.”
Lion’s mane jellies are some of the largest jellyfish in the world. They can be over 120 feet long, including their tentacles. However, Roney gives a friendly warning: “This jellyfish has a painful sting, so it’s best to keep your distance.”
Historically, these jellyfish have been known to pose risks to swimmers and divers. In fact, some reports suggest they can deliver powerful stings that cause serious pain. According to the Guinness World Records, they can weigh more than a ton, making them the heaviest jellyfish species on the planet.
Interestingly, there’s been an increased interest in jellyfish in recent years. Social media is buzzing with videos showcasing their beauty, sparking discussions about ocean conservation and the importance of protecting marine ecosystems.
As we continue to explore the depths of our oceans, these mesmerizing creatures remind us of the wonders underwater. It’s a beautiful world down there—full of surprises just waiting to be discovered.
For more on marine wildlife, you can check out sources like the Ocean Conservancy, which offers insights into ocean preservation efforts and the importance of marine life.

