Three new brittle star species emerge from tiny drifters off Oregon
brittle star
A marine animal with a central body and arms.
DNA barcoding
A method that matches organisms by comparing genetic signatures.
El Niño
A Pacific climate pattern with warmer-than-average surface water.
What happened
Off Oregon, marine researchers identified three new brittle star species from tiny larvae drifting in coastal water. The team also documented about ten larval forms that had never been photographed or described. The work appeared in the June 2026 issue of Invertebrate Biology. The research paper
Nicole Nakata, now a faculty member at the University of Alaska Southeast, worked with Richard Emlet of the University of Oregon's Oregon Institute of Marine Biology. During years of daily sampling near Charleston, Oregon, they collected microscopic brittle star larvae from incoming tidal water. They brought the samples to a laboratory and studied them under microscopes.
Why the larvae were hard to identify
Young brittle stars can look very different from adults. A larva may not resemble the animal it will become. A shape alone may not reveal its species.
The researchers therefore used DNA barcoding. This method compares genetic signatures between samples. It helped match larvae with known adult brittle stars. Some larvae matched adults known only from British Columbia and the San Francisco Bay Area. The result connected Oregon's coast with distant parts of the West Coast.
A surprising route to youth
Several larvae appeared to skip part of their development. Their mothers produced eggs large enough to nourish them through early growth. The larvae did not need to feed first. They moved directly toward the juvenile stage.
This does not mean the larvae stopped developing. It means the researchers observed a life path without the feeding stage described in the report. The study does not show that every species uses this pattern.
Why the discovery matters
Finding new species is only part of the result. Identifying larvae helps scientists record when species reproduce and where young animals occur. The team found that some species spawn during winter.
Those records create a baseline for Pacific coastal ecosystems. Future comparisons can show whether habitats change. They can also help researchers study how human activity affects those habitats. The larval matches also show that the Oregon coast can connect with a wider regional system.
What is known
The study confirms three new species, about ten larval forms that had not been photographed or described, and DNA matches between some larvae and adults. It also records examples of larvae reaching the juvenile stage without first feeding.
What is not known
The report does not establish how regularly larvae from distant adult populations reach Oregon. It also does not establish whether skipped stages appear every year. The lives of all species after the juvenile stage remain outside this report.
What comes next
Emlet plans to examine larvae during El Niño winters. El Niño brings warmer-than-average surface water to the Pacific. During the long study, some larval species appeared only in samples from past El Niño events.
New sampling can test whether that pattern returns. It may also help show whether species ranges change as the ocean warms. The findings and the planned follow-up are reported by Phys.org.
Tiny ocean drifters help reveal three new brittle star species
📰 Full story: Three new brittle star species emerge from tiny drifters off Oregon
Researchers found new species by studying young animals that look unlike adults.
larvae
Young animals that have not reached their adult form.
DNA barcoding
A way to compare DNA and identify a kind of organism.
baseline
A starting record used for later comparisons.
💡 The gist
- Three new brittle star species were found off Oregon.
- Researchers studied tiny larvae from daily tide samples.
- DNA helped match the larvae with adult animals.
What did the researchers study?
Nicole Nakata is a marine biologist at the University of Alaska Southeast. Richard Emlet is a marine biologist at the University of Oregon.
They collected brittle star larvae near Charleston, Oregon. The larvae drifted in incoming tidal water. The team studied them under microscopes.
The study also described about ten larval forms. These forms had not been photographed or described before. The research appeared in the June 2026 issue of Invertebrate Biology.
Daily sampling was important. The laboratory stood close to the coast. That made regular collection possible. A single visit might miss larvae that appear at certain times.
Why was DNA needed?
Young brittle stars can look very different from adults. A larva may not look like the animal it will become. Researchers therefore used DNA barcoding.
This method compares genetic signatures. It helped match larvae with known adult species.
Adults of those species were known from British Columbia or the San Francisco Bay Area. Their larvae appeared near Oregon. This shows links among West Coast ecosystems.
What was unusual about growth?
Some larvae seemed to skip a growth stage. Their mothers produced large eggs. The eggs held enough food for early development.
The larvae could grow without feeding first. Then they moved directly toward the juvenile stage.
Animals can use different life paths. Researchers must record these paths before comparing species.
Why does this matter?
The study gives scientists a better baseline. A baseline is a starting record for later comparisons.
The team also found winter spawning in some species. These records may help track habitat changes. They can also show how human activity affects coastal ecosystems.
What happens next?
The report leaves questions unanswered. Do larvae from distant adults reach Oregon regularly? Do skipped stages appear every year?
Emlet plans to study larvae during El Niño winters. El Niño brings warmer Pacific surface water. Some larvae appeared only during past El Niño events.
New samples can show whether that pattern returns. They may also reveal how warming changes species' ranges.
Tiny sea babies helped reveal three new brittle stars
📰 Full story: Three new brittle star species emerge from tiny drifters off Oregon
Scientists studied tiny sea babies and found new animals.
brittle stars
Small sea animals with arms.
DNA
A tiny body code that helps identify living things.
El Niño
A time when Pacific surface water becomes warmer.
Near Oregon, a state beside the Pacific Ocean, scientists found tiny sea babies.
Nicole Nakata, a marine scientist, collected them. Richard Emlet, another marine scientist, helped her.
They used a microscope to see the tiny bodies. These babies were young brittle stars, small sea animals with arms.
Young brittle stars can look unlike grown brittle stars. So the scientists checked DNA, a body clue. DNA helped match a baby with its grown-up kind.
They found three new kinds. They also recorded about ten other baby shapes.
Some mothers made big eggs. Those eggs held food for growing babies. The babies could grow before eating.
Some kinds made babies during winter. Next, scientists will watch an El Niño winter. El Niño can warm Pacific surface water. They will check which babies appear then.
We still do not know every baby's later life. These tiny drifters are teaching us about the sea.