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Video captures anglerfish in a sexual hookup

Anglerfish
A video still shows a female anglerfish with whiskery fin-rays glowing in the deep-sea dark. The rays may be bioluminescent, or they may be reflecting light from a submersible’s lamps. The male of the species can be seen hanging from the female’s belly. (Rebikoff-Niggeler Foundation Photo)

Scientists studying deep-sea anglerfish have long known about the bizarre mismatch between the species’ whiskered females and teeny-tiny males. But they’ve never captured video of live fish mating — until now.

A newly released video, captured by researchers Kirsten and Joachim Jakobsen during a five-hour dive in a submersible off the Azores in the mid-Atlantic, documents the sexual hookup for the first time.

Ted Pietsch, a University of Washington professor emeritus of aquatic and fishery sciences and curator emeritus of fishes at the Burke Museum of Natural History and Culture, was stunned by the footage.

“This is a unique and never-before-seen thing,” Pietsch said in a UW news release issued March 22. “It’s so wonderful to have a clear window on something only imagined before this.”

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Chinook salmon are shrinking – but why?

Chinook salmon
A Chinook salmon frequents Oregon’s McKenzie River. (Morgan Bond Photo via UW)

King salmon, the big fish that are famous in Alaska and the Pacific Northwest, are shrinking — not only in numbers, but in size as well.

A study published today in the journal Fish and Fisheries has found that the largest and oldest Chinook salmon (also known as king salmon or Oncorhynchus tshawytscha) have mostly disappeared along the West Coast.

“Chinook are known for being the largest Pacific salmon, and they are highly valued because they are so large,” lead author Jan Ohlberger, a research scientist in the UW’s School of Aquatic and Fishery Sciences, said in a news release. “The largest fish are disappearing, and that affects subsistence and recreational fisheries that target these individuals.”

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Scientists ID fish 40 years after it was caught

Duckbilled fish
The duckbilled clingfish has a broad snout like a duck’s bill. (Kevin Conway and Glenn Moore)

After spending 40 years sitting in a museum jar, a toothy fish from the waters off Australia has been identified as a previously unknown species dubbed the duckbilled clingfish.

To document the species’ characteristics, researchers turned to technologies that weren’t widely available when the fish was caught in 1977: digitized X-ray scans and 3-D printing.

The fish tale was laid out last week in the journal Copeia.

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