The Golden Orb Mystery That Stumped Deep-Sea Researchers for Years Has Finally Been Solved

When something unexpected shows up on the screen, a certain type of stillness descends upon a research vessel. That silence lasted a bit longer than usual in August 2023, somewhere over the Gulf of Alaska. Over two miles below the Okeanos Explorer, the Deep Discoverer ROV stopped over a rocky outcrop as it glided through black water.

No one on board could identify the smooth, golden-toned mound that was stuck to the rock; it had a little puncture near the top, giving the impression that something had crawled out of it. or into it. In a matter of days, the video went viral.

When faced with an unknown, the crew did what scientists do. They speculated. Perhaps an egg case. A lifeless sponge. a mat of germs. It might be alien, someone half-joked. Using a suction sampler, the team raised it, carefully wrapped it, and delivered it across the nation to the Smithsonian, where it was kept in a lab while the internet debated. These things work that way. While identification is silent and occasionally excruciatingly slow, discovery is loud.

Even Allen Collins, the zoologist who ultimately oversaw the analysis, sounded a little taken aback when he talked about the early stages of the study. Collins has spent decades studying oddities from the deep. They began by examining anatomy, searching for a mouth, muscles, or any other identifiable features. None of it was discovered. Just a layered, fibrous structure that is pleasant to the touch and strangely free of visible life. This type of discovery encourages scholars to be humble. Rarely does the ocean reveal its solutions on the first attempt.

Things changed under a microscope. Nematocysts, stinging cells from the Cnidaria phylum, which includes anemones, corals, and jellyfish, were abundant in the tissue. More precisely, the cells were spirocysts, which reduced the field to the Hexacorallia class. Thousands of species remain, but this is just the beginning. The results of the initial DNA barcoding were jumbled and tainted by fragments of microbiological life that had adhered to the sample. Eventually, whole-genome sequencing broke through the clutter and identified Relicanthus daphneae, a massive deep-sea anemone.

Estefanía Rodriguez of the American Museum of Natural History was able to help. She had spent years studying Relicanthus daphneae, and as soon as she saw the tissue, she knew it was a cuticle. It was the hardened, secreted base that the animal utilized to adhere to a rock, not the animal itself. In a way, the orb was like a fingerprint. The golden anchor was attached to the seafloor like an abandoned shell because the anemone had either moved on or died.

That makes it difficult to avoid feeling a little nostalgic. The solution turned out to be something delicate—a leftover—after all the conjecture and late-night speculations on social media. A trace. The deep ocean seems to be constantly reminding us that we know very little and that what we do discover frequently takes years to come. In this instance, two and a half. As scientists often do, Captain William Mowitt of NOAA Ocean Exploration framed it as inspiration to keep continuing, to keep sending vehicles down into water that no human could ever swim through. Visit NOAA Ocean Exploration’s archive to learn more about the mission’s larger efforts, where dozens of related riddles remain unsolved.

As I watched this narrative develop from a distance, I was struck by how unglamorous the conclusion was. No spectacular news conference, no big reveal. Just a meticulous series of microscopes, gene readings, and a researcher who just so happened to recall the up-close appearance of an anemone’s foot. These tiny, odd items abound in the deep. We will never be able to identify the majority of them. Occasionally, however, the perseverance pays out, and a golden orb ceases to be a mystery and turns into a silent reminder that something remarkable previously resided there.