Topic: Biology

In 2023, a strange golden object was found deep in the Gulf of Alaska. After years of study, scientists have finally identified what it is: the remains of a giant deep-sea anemone.

The mysterious 'golden orb' had puzzled scientists and captured public attention since its discovery during a NOAA expedition in 2023. The unusual golden mass was found at a depth of over 2 miles (3,250 meters) in the Gulf of Alaska. It took years of careful analysis to solve the mystery. Researchers from NOAA Fisheries and the Smithsonian used an integrative taxonomic approach, combining physical examination with genetic testing.

The team carefully collected the object using a suction sampler and sent it to the Smithsonian National Museum of Natural History (NMNH) for detailed study. Early analysis showed that the object did not have typical animal features. Instead, it consisted of fibrous layers packed with cnidocytes (stinging cells), indicating it likely belonged to a cnidarian, the group that includes corals and anemones.

Further study by National Systematics Lab scientist Abigail Reft identified the cells as spirocysts, which are unique to the Hexacorallia subgroup of cnidarians. Scientists also compared the specimen to a similar object collected in 2021 during an expedition aboard Schmidt Ocean Institute's Research Vessel Falkor, finding matching cellular structures.

Initial DNA barcoding attempts did not provide clear results, possibly because the sample contained genetic material from other microscopic organisms. To get a more definitive answer, the team turned to whole-genome sequencing. This deeper analysis confirmed the presence of animal DNA and revealed a strong genetic match to the giant deep-sea anemone Relicanthus daphneae.

Why It Matters

This discovery is important because it shows how much we still have to learn about our ocean's biodiversity. It also highlights the importance of rigorous taxonomic follow-up in telepresence-enabled ocean exploration.

Key Facts

• The 'golden orb' was found at a depth of over 2 miles (3,250 meters) in the Gulf of Alaska.
• It took years of careful analysis to solve the mystery of what it is.
• The object turned out to be the remains of a giant deep-sea anemone called Relicanthus daphneae.
• Researchers used an integrative taxonomic approach, combining physical examination with genetic testing.

Key Terms

Cnidarian

A group of animals that includes corals and anemones.

Implications

This discovery is important because it shows how much we still have to learn about our ocean's biodiversity. It also highlights the importance of rigorous taxonomic follow-up in telepresence-enabled ocean exploration.