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Articles on Fish

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It might be the world’s biggest ocean, but the mighty Pacific is in peril

The Pacific Ocean produces oxygen, helps regulates the weather, provides food and livelihoods. It's a place of fun, solace and spiritual connection. But its delicate ecology is under threat.
Scarecrows float in an oilsands tailings pond to keep birds from landing, in Fort McMurray, Alta., in June 2017. THE CANADIAN PRESS/Jason Franson

New technology makes wastewater from the oilsands industry safer for fish

New regulations will allow oilsands companies to release 1.3 trillion litres of liquid waste into the Athabasca River in 2022. A new technology could clean the wastewater before it's let go.
Hurricane Harvey set up a rare natural experiment to study the effects of fishing. NOAA via Wikipedia

When hurricanes temporarily halt fishing, marine food webs recover quickly

Hurricane Harvey destroyed the fishing infrastructure of Aransas Bay and reduced fishing by 80% over the following year. This removed humans from the trophic cascade and whole food webs changed.
Red-finned blue-eye Bush Heritage Australia / Adam Kerezsy

Australia’s smallest fish among 22 at risk of extinction within two decades

Twenty of these freshwater fish species have a 50% or greater probability of extinction within the next 20 years.
Plastic bottles, containers and other waste washed up from the Lagos lagoon at one of the waterfront jetties Stefan Harris/AFP via Getty Images

How we learnt more about dangerous pollutants in Lagos lagoon

Pollutants from industrial and domestic sources in the Lagos lagoon represent a cocktail of environmental contaminants.
Mannus Creek in NSW during the 2020 bushfire period. Luke Pearce

Before and after: see how bushfire and rain turned the Macquarie perch’s home to sludge

When the post-bushfire rains finally arrived, the situation for many fish species went from dangerous to catastrophic. A slurry of ash and mud washed into waterways, sending oxygen levels plummeting.
A brown Mediterranean grouper. We don’t see it on the picture, but it hosts many parasites! Parent Géry/Wikimédia

Even groupers have parasites

Mediterranean groupers are not alone: they are home to a wide variety of parasites.

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