Colossal squid have eyes the size of soccer balls, and can weigh up to 700kg. That's a lot of calamari!
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Articles on Fish
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The NSW government is soon expected to grant environmental approval to Snowy 2.0. But that process should be halted.
With restaurants closed and prices dropping, fishers are finding new ways to keep their business above water.
From a scientific perspective, the results are fascinating and world-first. From a personal perspective, what I saw will stay with me for a long time.
The arrangement of bones in our specimen's fins are the same as those of 'fingers' in tetrapods. The only difference is the digits are locked within the fin, and not free moving.
Fish, frogs, turtles and platypus at major risk of extinction following the bushfires. So why aren't they getting much attention?
Recent rains have not eliminated the threat of a repeat of last summer's mass fish deaths.
Fire debris flowing into Murray-Darling Basin will exacerbate the risk of fish and other aquatic life dying en masse in a repeat of the shocking fish kills of last summer.
Regulations have lowered mercury emissions globally, but the risks to ocean ecosystems and human health may be getting worse.
The EU continues to enter into fresh agreements with countries, despite evidence of serious population declines in the species of interest.
Fish may not have eyelids to close, but they sleep – and perhaps even dream.
Consumers are increasingly concerned about the sustainability of their fish.
Nutritious fish are being diverted away from countries that could benefit from them the most.
Fish can't read maps, and their eggs and larvae drift across national boundaries. Recent research shows that local problems in one fishery can affect others across wide areas.
Big storms with lots of flooding, like hurricanes Dorian and Maria, actually restore the Caribbean's delicate balance between native and nonnative fish species, new research finds.
Scientists are left with two conclusions. Either Nessie is an eel, or she never existed at all.
Fish that live in the sea have found amazing ways to control the amount of water and salt in their bodies, and stay hydrated.
As the oceans warm, fish are moving to stay in temperature zones where they have evolved to live. This is helping some species, hurting others and causing a net reduction in potential catch.
A new IPCC report has called for radical changes in food production to avoid catastrophic climate change. Rice-fish farming and mixed crops could help.
Many chronic diseases increase our risk of Alzheimer's disease. This link between our bodies and our brains means certain healthy choices could protect our cognitive function.
Top contributors
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John Long is a Friend of The Conversation.Strategic Professor in Palaeontology, Flinders University
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Associate professor in ecology, Charles Sturt University
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Professor, Macquarie University
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Professor of Fisheries and River Management, Institute for Land, Water, and Society, Charles Sturt University
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Honorary Fellow in Economics, The University of Queensland
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Associate Professor, University of Wollongong
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Senior Principal Research Scientist - Oceans and Atmosphere, CSIRO
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Lecturer in Marine Biology, Swansea University
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Research fellow, Heriot-Watt University
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Associate professor in Marine Biology, University of Melbourne
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Kate Barclay is a Friend of The Conversation.
Associate professor, University of Technology Sydney
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Adjunct professor, King Abdullah University of Science and Technology
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Associate professor, University of Canberra
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Adjunct Professor, Charles Sturt University
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Professor in Evolutionary Biology (jointly appointed with South Australian Museum), Flinders University
