Anatomy of a frogfish: New book explores world of fishes with arms and legs

Illustration of frogfish.

Any old fish can swim. But what fish can walk, scoot, clamber over rocks, change color or pattern and even fight? That would be the frogfish. The latest book by Ted Pietsch, UW professor emeritus of aquatic and fishery sciences, explores the lives and habits of these unusual marine shorefishes. “Frogfishes: Biodiversity, Zoogeography, and Behavioral Ecology” was published in March by Johns Hopkins University Press. 

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Ships’ emissions create measurable regional change in clouds

Pollution from ships create lines of clouds.

A container ship leaves a trail of white clouds in its wake that can linger in the air for hours. This puffy line is not just exhaust from the engine, but a change in the clouds that’s caused by small airborne particles of pollution. New research led by the University of Washington is the first to measure this phenomenon’s effect over years and at a regional scale. 

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‘Sushi parasites’ have increased 283-fold in past 40 years

An Anisakis worm is seen in a filet of salmon.

The next time you eat sashimi, nigiri or other forms of raw fish, consider doing a quick check for worms. A new study led by the University of Washington finds dramatic increases in the abundance of a worm that can be transmitted to humans who eat raw or undercooked seafood. Its 283-fold increase in abundance since the 1970s could have implications for the health of humans and marine mammals, which both can inadvertently eat the worm. 

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‘Fatal attraction’: Small carnivores drawn to kill sites, then ambushed by larger kin

Gray wolf caught on camera in Denali National Park in Alaska.

In many parts of the world, there is an imbalance in the food chain. Without top predators such as wolves and grizzly bears, smaller meat-eating animals like coyotes and foxes or grazers such as deer and elk can balloon in population, unchecked. This can initiate more deer-vehicle collisions, scavenging by urban coyotes and other unnatural human-animal interactions. University of Washington researchers have discovered that large predators play a key yet unexpected role in keeping smaller predators and deer in check. 

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Ocean acidification impacts oysters’ memory of environmental stress

Pacific oyster shells

As oceans absorb more carbon dioxide, they are becoming increasingly acidic and shifting the delicate balance that supports marine life. How species will cope with ocean acidification and the other consequences of global climate change is still very much unknown and could have sweeping consequences. Researchers from the University of Washington School of Aquatic and Fishery Sciences have discovered that ocean acidification impacts the ability of some oysters to pass down “memories” of environmental trauma to their offspring. 

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