Scientists Identify Mysterious Deep-Sea 'Golden Orb' Discovered in 2023

On August 30, 2023, a remotely operated vehicle named Deep Discoverer was crawling along the seafloor west of Prince of Wales Island in the Gulf of Alaska when its cameras caught something nobody on the research vessel above could explain. Stuck to a rock more than two miles down sat a dome-shaped, tannish-gold object about four inches across, with a small hole punched in one side [1]. "Everyone was like, 'What the heck? What is that?'" Allen Collins, a zoologist at the Smithsonian's National Museum of Natural History and NOAA Fisheries, later recalled [2].

Nearly three years later, a team of nine scientists has an answer — and it is stranger than most of the guesses.

What the Golden Orb Actually Is

The object is not an egg, not a sponge, and not — as the internet briefly hoped — evidence of extraterrestrial life. It is the abandoned cuticle of Relicanthus daphneae, a giant deep-sea anemone first discovered in the 1970s and formally described in 2006 [3][4]. The cuticle is a thin, multilayered coating secreted by the anemone's basal tissue — essentially a biological footprint left on the rock after the animal detached and moved on [1]. The hole in the center marks where the anemone's body separated from its own secretion [5].

R. daphneae is no ordinary anemone. Adults can have a column diameter exceeding three feet and pale purple or pink tentacles stretching nearly seven feet long [6]. The species lives on basalt substrates near the periphery of deep-sea hydrothermal vents at depths between 1,200 and 4,000 meters, and has been documented capturing prey as large as shrimp [7]. Its taxonomic position remains debated: mitogenomic analysis suggests it is sister to the order Actiniaria (true sea anemones) but may represent an ancient lineage of its own [8].

How Scientists Cracked the Case

The identification took from August 2023 to April 2026 — roughly two and a half years — and required techniques that went well beyond standard fieldwork [1][4].

The first step was microscopy. Abigail Reft, a scientist at NOAA Fisheries' National Systematics Laboratory, examined the specimen's cellular structure and identified spirocysts — a type of cnidocyte, or stinging cell, found exclusively in the subclass Hexacorallia [3][5]. That narrowed the field considerably, ruling out sponges, egg casings, and other non-cnidarian hypotheses.

Chemical analysis revealed the cuticle's primary structural component is chitin, the same tough fibrous polymer found in beetle exoskeletons and fungal cell walls [5]. This was consistent with known anemone cuticle biology but did not pinpoint a species.

The genetic work proved the most difficult. Initial DNA barcoding — the standard technique for species identification — was inconclusive. Heavy microbial colonization of the specimen meant that superficial sampling picked up DNA from bacteria and other microscopic life rather than the organism itself [4][5]. The team had to escalate to whole-genome sequencing, which returned a large quantity of genetic material matching R. daphneae. Sequencing of the mitochondrial genomes of both the golden orb and a comparison specimen from deep equatorial waters confirmed the two were genetically near-identical to a known R. daphneae reference genome [3][4].

Collins described the process plainly: "This was a complex mystery that required morphological, genetic, deep-sea, and bioinformatics expertise to solve" [5].

The findings were published on April 21, 2026 as a preprint on bioRxiv under the title "The Curious Case of the Golden Orb – Relict of Relicanthus daphneae (Cnidaria, Anthozoa, Hexacorallia), a deep sea anemone" [3]. The nine authors — Steven R. Auscavitch, Abigail Reft, Adena B. Collens, Christopher Mah, Merlin Best, Charlotte Benedict, Estefanía Rodríguez, Marymegan Daly, and Allen G. Collins — represent NOAA Fisheries, the Smithsonian National Museum of Natural History, and affiliated institutions [3].

The paper has not yet undergone formal peer review.

The Expedition That Found It

The golden orb was an incidental discovery. It was found during Seascape Alaska 5, the fifth in a series of six telepresence-enabled ocean exploration expeditions conducted from NOAA Ship Okeanos Explorer between May and September 2023 [9]. The broader Seascape Alaska campaign was designed to improve knowledge of poorly understood deepwater areas offshore Alaska, with research targets including deep-sea coral and sponge communities, submarine volcanoes, gas seeps, hydrothermal vents, and critical mineral deposits [9].

NOAA Ocean Exploration funded the series through its Fiscal Year 2023 funding opportunity, which distributed over $5 million across nine projects exploring U.S. waters off Alaska, Southern California, Puerto Rico, and the U.S. Virgin Islands [10]. The golden orb was not a target. It was spotted by chance during a routine ROV survey of the seafloor.

Why the "Mystery" Framing Deserves Scrutiny

The golden orb became a viral sensation in 2023, with headlines calling it "mysterious" and speculation ranging from alien artifacts to unknown life forms. That framing sells clicks, but it can obscure a basic reality of deep-sea biology: finding things scientists cannot immediately identify is normal.

Roughly 2,332 new marine species are formally described each year, according to data from the World Register of Marine Species [11]. The deep sea is the most common habitat type where these discoveries occur, precisely because so little of it has been sampled [12]. In the Clarion-Clipperton Zone alone — a vast abyssal plain in the central Pacific — researchers have cataloged over 5,500 species, with an estimated 92% still undescribed [13]. The Nippon Foundation-Nekton Ocean Census announced in 2025 that it had identified 866 new marine species across its expeditions [14].

Source: Frontiers in Marine Science / WoRMS

Data as of Jan 1, 2024CSV

Against that backdrop, a single unidentified specimen from a routine NOAA survey is unremarkable. "New species are described from the deep sea at a regular clip," as marine biodiversity researchers have noted, with a new shark, skate, ray, or chimera described every few weeks [12].

What does make the golden orb case scientifically notable is not the object itself but what it reveals. The cuticle represents a biological structure — a shed anemone footprint — that had not been documented before in this form. Steve Auscavitch, a Smithsonian marine biologist and lead author on the study, hypothesized that the cuticle built up over time: "I suspect that this anemone was growing here for quite some time, kind of layers and layers and layers of this material" [2]. The researchers have also proposed that the orb could be a remnant of incomplete asexual reproduction through pedal laceration, a process where an anemone's base tissue detaches while the upper body relocates [5].

Yet even the authors acknowledge limits to their understanding. As the preprint states, "explanation of the golden orb morphology remains a vexing issue" [5]. The formation mechanism is not fully resolved.

What the Discovery Says About Deep-Sea Ignorance

The golden orb story is ultimately a story about how little humanity knows about the deep ocean.

Source: NOAA Ocean Exploration

Data as of Jan 1, 2025CSV

Only about 28% of the global ocean floor has been mapped at high resolution. Just 5% of the ocean has been explored in any systematic way. Less than 1% of the deep pelagic realm — the vast mid-water column — has been sampled at all [15]. In Alaska specifically, only 34% of the seafloor had been mapped as of January 2023, and far less had been directly observed [9].

This sampling gap has practical consequences. Formally describing a newly discovered deep-sea species — giving it a name, publishing the taxonomy — can take 20 to 40 years due to backlogs in taxonomic expertise and museum collections [16]. Many specimens sit on shelves for decades before anyone has time to examine them. Auscavitch noted that thousands of uncatalogued specimens remain unsequenced, with the potential for discoveries comparable to the golden orb hidden in existing collections [2].

Source: OpenAlex

Data as of Jan 1, 2026CSV

Academic interest in deep-sea species discovery has grown substantially, with publications on the topic peaking at over 10,500 papers in 2023 [17]. But publication volume alone does not translate into funded expeditions or resolved taxonomic backlogs.

Ecological Implications and Open Questions

The golden orb's identification raises several questions that the preprint does not fully answer.

The cuticle was densely colonized by microbial communities, suggesting it functions as a microscale ecosystem on the seafloor — a localized substrate supporting nutrient cycling in an otherwise barren environment [5]. Whether this represents a meaningful food-web pathway or symbiotic relationship remains uninvestigated.

R. daphneae itself occupies a niche at the edges of hydrothermal vent ecosystems, which are among the most chemosynthetically productive habitats on Earth [7]. Its unusually large spirocysts and tentacles appear adapted for capturing free-swimming prey, including shrimp [7]. The species has been documented at hydrothermal vents in the East Pacific Rise and, more recently, in the Indian Ocean [7]. Finding evidence of its presence in the Gulf of Alaska extends its known geographic range.

No pharmaceutical or industrial applications of the cuticle's chitin composition have been reported, though chitin-derived compounds are widely used in biomedicine, agriculture, and water treatment. Whether deep-sea chitin variants have novel properties is an open question.

Funding Uncertainty Threatens Follow-Up

No specific follow-up expeditions to study R. daphneae cuticles or their ecological role have been publicly announced [2]. The question of whether and when such research could happen is inseparable from the funding environment.

NOAA Ocean Exploration's FY2025 funding opportunity allocated an estimated $3 million for ocean exploration and maritime heritage projects [18]. That is a fraction of what comprehensive deep-sea research requires. More concerning for the field, the Trump administration's proposed FY2026 budget would cut nearly $1.7 billion from NOAA's total budget, with the dissolution of the Office of Oceanic and Atmospheric Research accounting for a large share of the proposed reductions [19].

William Mowitt, acting director of NOAA Ocean Exploration, framed the golden orb identification as a case for continued investment: "With advanced techniques like DNA sequencing, we are able to solve more and more of them" [2]. But solving mysteries requires finding them first, and finding them requires ships, ROVs, and the researchers trained to operate them.

The golden orb sat on a rock two miles down, doing nothing, for who knows how long before a camera happened to pass by. The question for deep-sea science is not whether there are more such oddities waiting — there almost certainly are, by the thousands — but whether anyone will be funded to go look.

What Remains Unresolved

The preprint is not the final word. Peer review may challenge or refine the conclusions. The formation mechanism of the cuticle — why it takes a dome shape, why the gold color — is described by the authors themselves as unresolved [5]. The relationship between R. daphneae and its taxonomic neighbors remains under active debate, with some researchers questioning whether it belongs to a separate order entirely [8].

And the basic statistics of the deep ocean remain humbling. With over 90% of deep-sea species in some regions still undescribed [13], and fewer than 1% of deep waters systematically sampled [15], the golden orb is less a breakthrough than a reminder: the seafloor is full of things science has not yet seen, and may not get the chance to study before funding, climate change, or deep-sea mining alters them beyond recognition.