Fishermen and scientists questioning how many fish can be sustainably taken from a reef believe they've quantified the tipping point.
Richard Gray, London Freshwater fish are the most endangered group of animals on the planet, with more than a third facing extinction, according to a report British scientists are preparing.
Jack Shenker CAIRO: A deadly combination of overfishing, illegal waste dumping and irresponsible tourist behaviour helped trigger Egypt's recent shark attacks, preliminary scientific findings show.
Michael Green Starfish, cyclones, chemicals. If things continue the way they are, the Great Barrier Reef won't be great for much longer.
Peter Hannam When it comes to jellyfish on Australian beaches, getting stung may be the least of our worries.
Global warming is causing a silent storm in the oceans by acidifying waters at a record rate, threatening marine life from coral reefs to fish stocks, an international study showed.
Andrew Darby Australian fishers are edging closer to sustainability, but a handful of wild stocks are still being damaged, according to a federal government report.
The Arctic ecosystem, already under pressure from record ice melts, faces another potential threat in the form of rapid acidification of the ocean, according to an international study.
Conservationists warned the rare Chinese white dolphins, also known as pink dolphins for their unique colour, face extinction unless urgent action against pollution and other threats is taken.
Andrew Darby The outcast super-trawler Margiris has found a new place to go - one of the world's most troubled jack mackerel fisheries in the South Pacific.
AS FISH get smaller under man's environmental impact they will become more prone to predators and a crucial food source will become more endangered than thought obvious, warn scientists.
Andrew Darby The first nationwide snapshot of Australian wild fisheries has found most are in good shape, but critics say it fails to mention fish whose stocks have already crashed.
Marika Dobbin Giant friendly fish that can live for 70 years but were almost wiped out of Victorian waters have established a school in East Gippsland.
Australia leads the way in trying to protect the world's fish population. But depleting stocks of jack mackerel point to a wider global calamity.
Ben Cubby IT'S the sharks, manta rays and critically endangered sea turtles that John West rejects that should eventually make it sustainable.
Tom Arup THEY are the gentle giants of the ocean, weighing as much as 1400 kilograms, but an emerging Chinese medicine market for gill rakers is threatening global populations of giant manta rays.
Andrew Darby Australia is joining France and the European Union in supporting a network of marine reserves fanning out from east Antarctica, as global ocean protection gains pace.
The two-year ban imposed this week on the freshly renamed super trawler Abel Tasman had been brewing for months.
Farrah Tomazin, Stephanie Peatling Super trawlers will be prevented from operating in Victorian waters under a Baillieu government ban designed to protect the state's recreational and commercial fishing interests.
David Wroe Like many forests on land, the giant kelp jungles in the waters off south-east Australia are gravely threatened by climate change, scientists say.