A bloat of hippos in a watering hole

Hippo Poop Kills Fish, but There’s an Upside

A robot disguised as a crocodile is helping scientists understand that mass fish die-offs serve a purpose.
Fisherman taking freshly caught trout out of fishing net.

The Dark Side of Fish Stocking

It takes place out of sight of non-anglers, but fish stocking, or adding fish for the benefit of sport fishing, is a widespread practice in resource management.
Red snapper chromolithograph 1898

Fish Are Smarter Than You Think

Fish intelligence? Yes, many studies have documented the ability of fish to learn from their environment. Fish exposed to a more complicated environment have an edge in learning.
Juvenile American Eel

The Final Migration of the American Eel

Every year, thousands of American eels make an amazing migration from their freshwater homes into the Atlantic Ocean, where they spawn and die.
Electric eel

5 Shocking Facts about Electric Eels

First things first: eels are fish.
Tuna fish

What Makes Fish Swim Fast

How do fish swim? Having fins and tails help, But it takes more than that to be fast and avoid danger. Diving into fish physics.
dead fish float in a polluted river

A Dead Fish “Vitamin Pill,” Microbes that Put Dinner on the Table, and a Truck that Runs On Cow Manure

From microbial biochemistry to recycling dead fish to manure-to-energy converters, here’s this week’s most surprising sustainability news.
Faceless Cusk

How Can A Fish Not Have a Face?

From the "weird science" files: A research vessel off the coast of New South Wales in Eastern Australia hauled up a fish that did not seem to have a face.
Barracuda school

How Do Fish Schools Work?

Fish schools turn, contract, expand, even part and come back together all without missing a beat. Yet fish are individuals, not a hive mind.
Marineland Porpoise

Why Don’t We Consider Fish Worth Saving?

Until recently, Americans did not generally consider fish to be wildlife. As a result, conservation measures for them got a late start.