Scientists have long believed that our distant cousins are the placoderms, and ancient group of armoured fish. But a new study is casting doubt on that view.
Up to 236,000 tonnes of microplastic enter our oceans each year.
Light pollution is changing the day-night cycle of some fish, dramatically affecting their feeding behaviour.
It's a watery battle of the sexes.
Computer dating for animals? Finding the right matchup - using DNA rather than personality questionnaires - could help select the best partnerships for captive breeding programs.
Aquaculture development needs to be able to trust the science, and the science needs to be delivered in a timely way if we hope to ensure long-term sustainability of this industry.
Urban farms might be trendy, but they won't replace rural agriculture anytime soon.
Next time you bite down on something you're eating, spare a thought for the evolutioniary leap made by an ancient fish that gave rise to our jaws.
Many of the iconic coastal villages of Australia have a close association with professional fishing.
Hollywood shirks its ethical responsibilities when it comes to vulnerable animal species.
To understand how some creatures evolved, you need to see how their brain developed over millions of years. That's now possible thanks to some clever use of scanning technology.
The Earth is full of many varied species from the largest mammals to the tiniest organisms. But we now think there could be ten times more species than was originally thought.
Freshwater fish are declining everywhere, in part thanks to dam-building. But we can have both.
The release of the movie 'Finding Dory' comes with renewed calls to leave fish in reefs – a good idea in this case – but catching some ornamental fish can have a positive impact on reef communities.
The recent severe bleaching on the Great Barrier Reef has also affected anemones, which provide homes for clownfish.
Many pet fish end up in ponds, fountains and waterways. But before ditching your goldfish in the park, stop and think about the viruses you could also be releasing.
Farmed fish have a high rate of a deformity that hampers their hearing, and this can be a problem if they're released into the wild.
For centuries, the fossil remains of back-boned animals were studied primarily from their hardened bones. Now palaeontologists can study the softer side of these ancient creatures.
The bleaching hitting the Great Barrier Reef not only harms corals. As these close-up photos show, it also deprives many other species of a home and livelihood.
Don't confuse studies doubting some of the benefits with the bigger picture.