The Golden Orb Two Miles Under the Sea Was an Anemone All Along — What That Tells Us About the Deep

On August 30, 2023, a remotely operated vehicle piloting through the darkness more than two miles beneath the Gulf of Alaska paused before something no one on the research vessel NOAA Ship Okeanos Explorer could explain: a smooth, gold, dome-shaped object roughly four inches in diameter, tightly adhered to volcanic rock on a seamount approximately 200 miles from Sitka, Alaska [1][2]. The object had a small hole or tear near its base, revealing a similarly golden interior. The ROV operators carefully suctioned it off the rock and sent it to the surface.

Two and a half years later, in April 2026, a team of scientists published their answer on the bioRxiv preprint server: the golden orb is a remnant of the cuticle and basal tissue of Relicanthus daphneae, a giant deep-sea anemone whose tentacles can extend nearly seven feet [3][4].

The journey from "What the heck?" to a species name required morphological analysis, failed DNA barcoding, whole-genome sequencing, and cross-referencing with specimens from opposite hemispheres. The story offers a useful case study in how deep-sea science actually works — slowly, expensively, and often anticlimactically — at a moment when both public fascination and industrial interest in the deep ocean are surging.

The Discovery: Seascape Alaska 5

The golden orb was collected during Seascape Alaska 5, one of six telepresence-enabled expeditions NOAA conducted off Alaska between May and September 2023 [5]. The ship spent over 160 days at sea that year, mapping and exploring deepwater areas with a focus on the Aleutian Islands, the Gulf of Alaska, and the Aleutian Trench [5].

The object was found at a depth of 3,250 meters (approximately 10,660 feet) on a seamount in the Gulf of Alaska [1][2]. Aboard the ship and among the scientists watching via live stream, the immediate reaction was bewilderment. "Everyone was like, 'What the heck? What is that?'" recalled Allen Collins, a zoologist at the Smithsonian's National Museum of Natural History who would eventually lead the identification effort [4][6].

Initial speculation ranged from an egg casing to a dead sponge attachment to coral. On social media, less disciplined hypotheses proliferated — mermaid eggs, dolphin eggs, extraterrestrial material [2][7].

The Identification: A Multi-Year Puzzle

The specimen was sent to the National Systematics Laboratory, a joint NOAA Fisheries and Smithsonian operation in Washington, D.C. What followed was a methodical, multi-step investigation that took roughly 30 months [3][4].

Morphological analysis came first. Under a microscope, the object lacked any recognizable animal anatomy — no mouth, no tentacles, no internal organs. It was a fibrous material with a layered surface [2]. Scientist Abigail Reft applied special staining techniques to the cells and identified them as spirocysts — a type of adhesive stinging cell found exclusively in Hexacorallia, a subclass of cnidarians that includes corals and anemones [2][3]. This was the first concrete lead: whatever this was, it came from something related to corals or anemones.

DNA barcoding was attempted next but proved inconclusive. The specimen, having sat on the deep seafloor, was contaminated with DNA from microscopic organisms living on its surface, which made isolating the target organism's genetic signature difficult [2][3].

Whole-genome sequencing finally broke the case. By sequencing the complete mitochondrial genome and comparing it against reference databases, the team found the specimen was "genetically almost identical" to Relicanthus daphneae [2][3]. A second, similar specimen collected by deep-sea researchers elsewhere provided corroborating data — both were genetically nearly identical to a known Relicanthus reference genome [2].

The conclusion: the golden orb was the basal structure — essentially the "foot" — that a giant sea anemone secretes beneath itself to cement its body to rock substrate. When the anemone dies or detaches, this golden cuticle remains behind [3][4].

What Is Relicanthus daphneae?

Relicanthus daphneae is one of the more extraordinary animals in the deep sea. First described in 2006 from specimens collected near hydrothermal vents in the Eastern Pacific by the submersible DSV Alvin, it has a cylindrical body up to a meter across and tentacles that extend up to 2.1 meters (nearly seven feet) [8][9]. It is pale purple or pink and lives on the periphery of hydrothermal vent systems at depths between roughly 1,200 and 4,000 meters [8].

Prior to the Alaska discovery, the species had been observed approximately 30 times globally, from Antarctic waters to the Pacific [6]. Its known distribution centered on the Lau Basin in the southwestern Pacific and the Eastern Pacific Rise [8]. The Gulf of Alaska specimen, found at 3,250 meters approximately 200 miles from Sitka, represents the most northern record for the species and significantly extends its known geographic range [3][6].

Jon Copley, a marine ecologist at the University of Southampton who was not involved in the research, noted that the finding suggests these animals "may be more widespread" than previously understood. "Now that we know they leave behind golden orbs, we may get a better idea of how far they spread," he said [4][10].

The Broader Context: What We Don't Know About the Deep

The identification of one golden object as a known (if rare) species might seem modest. But it arrives against a backdrop of staggering ignorance about deep-sea life. An estimated 91% of species on the global ocean floor remain undescribed by science [11]. In the Clarion-Clipperton Zone of the central Pacific — a region targeted for deep-sea mining — that figure rises to 92% based on a survey that identified over 5,500 species, the vast majority new to science [11][12].

Source: Frontiers in Marine Science / Natural History Museum

Data as of Jan 1, 2024CSV

Research on deep-sea biodiversity has accelerated sharply in recent years. Academic publications on the topic grew from roughly 3,200 papers in 2011 to over 21,000 in 2025, reflecting both improved technology and growing concern about industrial pressures on deep-sea ecosystems [13].

Source: OpenAlex

Data as of Jan 1, 2026CSV

The deep sea — defined as waters below 200 meters — constitutes approximately 84% of the ocean's area [11]. Below 2,000 meters, the percentage of undescribed fauna increases further. The Natural History Museum in London estimated in 2022 that two-thirds of all life in the seabed remains unknown to science, with 60% of DNA sequences from marine sediments failing to match any described organism at even a high taxonomic level [12].

Does the golden orb change these statistics? Not materially. It adds a data point confirming that a known species has a wider range than documented, but it does not describe a new species. Its scientific value lies more in methodology — demonstrating that whole-genome sequencing can identify even degraded, amorphous biological remnants — and in expanding distributional records for a poorly documented deep-sea organism [3][4].

Resource Allocation: Was It Worth Two and a Half Years?

The Seascape Alaska expeditions were not mounted to find the golden orb. They were systematic mapping and exploration campaigns across poorly documented Alaskan deepwater territory. NOAA Ocean Exploration's FY2023 funding opportunity distributed over $5 million across nine projects [5]. The golden orb's identification was a byproduct of broader exploration, not a dedicated research program.

The time invested — approximately 30 months from collection to preprint — reflects the reality of deep-sea taxonomy, not an unusual expenditure of resources. Collins and colleagues required "morphological, genetic, deep-sea and bioinformatics expertise" and comparison with specimens from other institutions globally [6]. The preprint, posted April 21, 2026, lists multiple authors spanning NOAA Fisheries and the Smithsonian [3].

Whether this allocation is "defensible" depends on the framework applied. NOAA and the Smithsonian maintain collections with thousands of unidentified specimens. Collins himself noted he continues working on other identifications from the same expeditions, including a carnivorous sponge and new jellyfish species [6]. The golden orb received disproportionate attention not because scientists prioritized it, but because public interest demanded answers.

Conservation and Regulation: Mining Arrives in the Gulf of Alaska

The golden orb's discovery location — a seamount in the Gulf of Alaska — now sits within a zone of active regulatory controversy. In January 2026, the Bureau of Ocean Energy Management published a Request for Information for mineral leasing on the Outer Continental Shelf offshore of Alaska, covering over 113 million acres spanning depths from 10 meters to over 7,000 meters, including numerous seamounts in the Gulf of Alaska [14][15].

The proposal has drawn sharp opposition. Ocean Conservancy warned in January 2026 that "deep-sea mining threatens Alaska's ocean future," citing risks to salmon, halibut, crab, marine mammals, and coral species in the affected areas [15]. Over 940 marine science and policy experts from more than 70 countries have called for a pause or moratorium on deep-sea mining globally, citing risks of "irreversible biodiversity loss" and destruction of fragile ecosystems [16].

The specific seamount where the golden orb was found does not appear to be within an existing marine protected area based on available information. The Gulf of Alaska waters fall within U.S. jurisdiction (the Exclusive Economic Zone), meaning they are subject to domestic regulation rather than the international framework governing the high seas [14]. BOEM has indicated that a limited desktop Environmental Assessment may be sufficient before leasing — potentially allowing equipment testing without a full Environmental Impact Statement [14].

The golden orb's identification as a remnant of Relicanthus daphneae — an animal associated with hydrothermal vent peripheries that are also mineral-rich zones of interest to mining companies — adds another layer to this conflict. If the species is more widespread in Alaskan waters than previously known, its habitat overlaps directly with proposed extraction zones.

The Hype Question: Mystery vs. Science

Collins himself offered the most candid assessment of the media dynamic. After the golden orb went viral in 2023, he told reporters: "I was shocked, but it's always nice when people are interested in the deep sea" [6]. Upon solving the mystery, his tone shifted: "Now no one's going to care, because it's not as interesting as a mystery" [6].

This tension is inherent to deep-sea science communication. Copley, the University of Southampton ecologist, offered a more measured take, calling it "great to have an answer" and noting that "as is often the case in the deep sea, it's a surprise" — the identification as anemone remnants was not what anyone had predicted from appearance alone [10].

The criticism that "mystery creature" stories generate hype disproportionate to scientific significance has some basis here. The golden orb is not a new species. It is not a new phylum. It is the dead remnant base of a known organism, found in a new location. Its identification confirms that whole-genome sequencing works on degraded deep-sea specimens and extends Relicanthus daphneae's range northward — useful contributions to deep-sea biology, but not transformative ones.

What the golden orb story did accomplish, beyond the science, was direct public attention to the deep sea at a moment when policy decisions about that environment — particularly around mining — are being made with limited public awareness. Whether that attention translates into informed engagement with regulatory processes like BOEM's Alaska leasing proposal remains to be seen.

What Comes Next

The preprint awaits formal peer review and journal publication [6]. Collins and colleagues continue identifying specimens from the Seascape Alaska expeditions. The regulatory process for deep-sea mining off Alaska continues, with environmental groups pushing for comprehensive impact assessments before any leasing proceeds [14][15].

The golden orb, now that its identity is known, becomes something more prosaic and more interesting simultaneously: evidence that a giant anemone, documented fewer than three dozen times worldwide, lives on Alaskan seamounts that the U.S. government is considering opening to mineral extraction. The mystery is solved. The questions it raises about what else lives in those depths — and whether we will protect it — remain wide open.