Fish

Tilapia is a biosecurity nightmare in Australia but popular on many menus overseas. Some in the fishing industry think if you catch the pest fish in Queensland you should be able to eat it.

The largest survey of Australia's freshwater fish suggests about one third should be listed as threatened species.

Some South Australian fishers are worried recreational catches are skewing the data on fish stocks, as amateurs aren't subject to the same regulations.

Is your shark knowledge a bit … fishy? Let's find out how well you know these impressive ocean predators.

Using underwater endoscopes, researchers have already discreetly filmed the freshwater cod taking refuge in several of the new purpose-built habitats.

Conservationists believe harvesting the invasive fish tilapia and turning it into fertiliser could help save one of Queensland's most scientifically important ecosystems.

Sawfish have a shark-like body behind an extended nose resembling a saw. A study collecting fishers' knowledge hopes to discover more about the endangered species.

Imagine wading in the shallows at the beach and tasting mussels and clams hidden under the sand — with your feet. A new study shows fish species evolved to do just that.

Mussels, long regarded as little better than fish bait, are now sold as a gourmet delicacy — and veteran fisherman Lance Wiffen says farming them sustainably is also helping the environment.

A team of Indigenous rangers are working with scientists to understand just how much wildlife still exists at Gamay, also known as Sydney's Botany Bay.

Japanese researchers have captured a surprising escape tactic used by juvenile eels, and they aren't the only animal that can escape digestion.

Australian researchers and chef Duncan Welgemoed are advocating for the pest species to be used to feed into health and beauty products in a multi-billion-dollar industry. 

Local divers are incensed by the killing of a well-known pair of large bull rays, after their cut-up remains were found off a popular diving spot on Sydney’s lower north shore.

The Dalhousie goby, catfish and hardyhead, all located in a freshwater spring in outback South Australia, join a threatened species list growing larger by the year.

Few things make Tegan Warren as upset as the idea of a goldfish about to be flushed down the toilet.

Red-worm-of-trout can infect humans and other mammals when they eat uncooked or undercooked fish caught in fresh water and can be lethal to some animals.

Commercial fishers say fish are dying "left, right, and centre" in the South Lagoon and they are sick of waiting for governments to make a decision on how to fix the degraded environment.

The finding bucks the belief that lamprey fish live in cold climates and gives researchers hope the species could be resistant to climate change.

Australia's Reef Authority had $80 million to repair and refurbish its showpiece aquarium in Townsville, but scrapped the project for a grander design it knew it could not pay for.

A New South Wales aquaculture farm will export tens of thousands of native golden perch fingerlings to China as demand grows for Australian fish.