NOAA Scientists Identify Mysterious Golden Orb as Remnant of Deep-Sea Anemone After Multi-Year Investigation

Apr 24, 2026, 10:36

Introduction

A golden-colored mass discovered on the seafloor of the Gulf of Alaska in 2023 has been identified as a remnant of a deep-sea anemone, solving a two-and-a-half-year scientific puzzle. The object, which initially confused researchers, was determined through advanced genetic analysis to be the base attachment structure of the species Relicanthus daphneae.

Main Body

The specimen was collected during a National Oceanic and Atmospheric Administration (NOAA) expedition called Seascape Alaska 5, at a depth of about 3,250 meters. When the team first saw it, they were unsure what it was. Their guesses included an egg casing, a sponge, or even material from outer space. The object was retrieved using a suction sampler and then sent to the Smithsonian National Museum of Natural History for further study. Initial DNA testing did not provide clear results because the sample was contaminated by microscopic organisms. However, later whole-genome sequencing confirmed the presence of animal DNA, and a large part of it matched the genetic profile of the giant deep-sea anemone Relicanthus daphneae. Furthermore, mitochondrial genome sequencing showed that the DNA was nearly identical to a reference genome for that species. Allen Collins, a zoologist and director of NOAA Fisheries'' National Systematics Laboratory, described the identification as a difficult task that required expertise in morphology, genetics, deep-sea biology, and bioinformatics. NOAA officials noted that while many deep-sea organisms are quickly identified through team discussions, some discoveries require a long investigation. They emphasized that the identification process took several years because rigorous scientific validation was necessary. Captain William Mowitt, acting director of NOAA Ocean Exploration, stated that such mysteries are common in deep-ocean exploration. He added that advanced techniques like DNA sequencing help solve them, and this work supports the broader goal of understanding ocean resources and their impact on economic security and environmental sustainability.

Conclusion

The golden orb has been confirmed as a relic of a deep-sea anemone, specifically the dead cellular material from its base that once attached to a rocky surface. This finding solves one mystery but highlights how much remains unknown in the deep ocean, where further exploration continues to bring new discoveries.

Vocabulary Learning

contaminated
Made impure or harmful by contact with something unclean or poisonous.受污染的
Example:Initial DNA testing did not provide clear results because the sample was contaminated by microscopic organisms.
expedition
A journey or voyage undertaken by a group of people for a specific purpose, especially exploration.探險隊；遠征
Example:The specimen was collected during a NOAA expedition called Seascape Alaska 5.
puzzle
Something that is difficult to understand or explain; a mystery.謎團
Example:The object initially confused researchers, creating a scientific puzzle.
remnant
A small remaining part of something.殘餘物
Example:The golden orb was identified as a remnant of a deep-sea anemone.
rigorous
Extremely thorough, strict, and accurate.嚴謹的；嚴格的
Example:The identification process took several years because rigorous scientific validation was necessary.

Sentence Learning

The object, which initially confused researchers, was determined through advanced genetic analysis to be the base attachment structure of the species Relicanthus daphneae.
Relative clause 'which initially confused researchers' provides extra information about the object. Passive voice 'was determined' focuses on the object rather than who determined.關係從句「which initially confused researchers」提供關於該物體的額外資訊。被動語態「was determined」強調物體而非誰確定。
Initial DNA testing did not provide clear results because the sample was contaminated by microscopic organisms.
'Because' shows cause-and-effect. Passive voice 'was contaminated' emphasizes the sample.「because」表示因果關係。被動語態「was contaminated」強調樣本。
However, later whole-genome sequencing confirmed the presence of animal DNA, and a large part of it matched the genetic profile of the giant deep-sea anemone Relicanthus daphneae.
'However' contrasts with the previous sentence. 'And' connects two related facts.「However」與前句對比。「and」連接兩個相關事實。
NOAA officials noted that while many deep-sea organisms are quickly identified through team discussions, some discoveries require a long investigation.
'While' introduces a contrast between quick identification and long investigation. Passive voice 'are identified' focuses on the process.「while」引入對比：快速識別與長期調查。被動語態「are identified」強調過程。
This finding solves one mystery but highlights how much remains unknown in the deep ocean, where further exploration continues to bring new discoveries.
'But' shows contrast between solving one mystery and highlighting unknowns. Relative clause 'where further exploration...' describes the deep ocean.「but」表示對比：解決一個謎團與凸顯未知。關係從句「where further exploration...」描述深海。