Workers have dipped nets and a naturally occurring chemical into a storm water retention pond near Edmonton in a bid to kill thousands of unwanted goldfish that have made the water body home. Officials say the aquatic invaders are the result of goldfish reproducing after people released their unwanted pets into the wild or flushed them down the toilet.

Five minutes in the life of a guppy in the terrible spring of 2015: You’re swimming around with your friends in a tank. You’ve been here for days. Food falls from the sky. Everything is fine. Then suddenly, you’re netted up and dropped into an alien world, all alone, just you and the glass. You panic at first, but in time your courage returns and you investigate. Glass wall; glass wall; glass wall; glass wall. A scrap of plastic on the aquarium floor provides the only scant shelter. Hmm …

Fish appear to be individuals with complex personalities, according to new research. Researchers tested the idea that Trinidadian guppies all had a fairly standard response to potential dangers. The theory went that they had a “simple spectrum” of reactions to danger – some things were more frightening than others but the fish basically all responded in the same way.

The vanishing of an iconic river creature in Alabama poses terrifying questions about the water we swim in and fish in and drink. (Jul 24, 2017)

Restaurants, fishermen, and environmentalists rebrand "trash fish"

There's something to be learned from every fossil, but now and then, a fossil is found that doesn't quite seem to fit. These are the exciting ones. Like Hongyu chowi , a newly described fish fossil that seems to imply that more species were...

So it’s up to people to keep dangerous trash out of the ocean’s food supply.

Thousands of Atlantic salmon have escaped into Pacific waters east of Victoria after nets containing an estimated 305,000 fish were damaged at a U.S. fish farm in the San Juan Islands on Saturday. The company, Cooke Aquaculture, blamed "exceptionally high tides and currents coinciding with this week's solar eclipse" for the failure of the net pen near Cypress Island.

The situation is entirely too catastrophic in magnitude for humans to control it. Fishing industries in the region have been toppled by contamination reports ran on fish. And now there are even studies providing evidence that fish off the coast of the United States and Canada are adversely affected. A scientist named Ken Buesseler claims that the radiation levels currently found in fish may not be at levels toxic to humans. But many scientists say there isn’t such a thing as “safe levels” of radioactive material consumption.

A team from the Universities of Liverpool and Oslo have just discovered how goldfish and Crucian carp are able to turn lactic acid into ethanol. Goldfish can survive without oxygen because they take lactic acid and convert it into ethanol which flows across their gills out into the water.

The fish are painted meticulously, layer by layer, the sandwiched slices revealing slightly more about each creature, similar to the function of a 3D printer.

Residents of La Unión, Honduras, say that after a fierce storm, the ground is covered with small fish. “A blessing from God,” one farmer said. By Kirk Semple.

The Guardian robot collects lionfish so we can eat them—before they destroy ecosystems by chowing down on all the local fish.

A fifth of male fish are now transgender because of chemicals from the contraceptive pill being flushed down household drains, a study by has suggested.

The 193 UN member nations issue an urgent call for action to reverse the decline of world's oceans, with US backing the plan.

Japan’s iconic fish market is still booming after 82-years—for now. By Shoko Oda. .

A fish created by spontaneous androgenesis is the first known vertebrate to arise naturally by this asexual reproductive phenomenon.

Genetically-identical animals experiencing the same environmental conditions should develop, in theory, identical behavioral traits. However, Bierbachet al. show here that behavioral differences still emerge among cloned fish under tightly controlled experimental conditions.

Humans are not the only species to show a strong work ethic and scruples. Researchers have found evidence of conscientiousness in insects, reptiles, birds, fish and other critters, such as working hard, paying attention to detail and striving to do the right thing.