Marine Biology

Geologists have discovered fossils from an ancient coral reef deep beneath the surface of outback Queensland, which have attracted the attention of international researchers.

A pod of about 10 dolphins delights kayakers in Sydney Harbour this morning, with one kayak tour operator saying it's rare to see the animals that far west.

Since whaling was banned in 1986, whale numbers have rebounded but threats, mostly human-made, remain and are on the agenda at a meeting in Hobart.

Warrnambool's Maremma guardian dogs, as seen in the movie Oddball, have not stayed a night on Middle Island for two years.

A small but positive increase in the number of dugongs spotted in coastal areas in south-east Queensland has researchers feeling cautiously optimistic about the vulnerable marine mammal achieving population revival. 

Fifteen-thousand yellowtail kingfish fingerlings have arrived in Tasmania from Western Australia to be released into a pen in Bass Strait as part of a trial.

Stunning scenes of the world through microscopes have been put on display by the Nikon Small World In Motion competition winners.

Throughout the algal bloom crisis, citizen scientists off the coast of South Australia helped with research. Now, with deadly bird flu impacting wildlife, they are taking to the ocean to keep watch.

A WA government-commissioned analysis finds the scenic and popular Matilda Bay is the safest spot for a ferry terminal, just as another report prompted by an advocacy group says it would put river users at serious risk.

Fishing industry and Indigenous community leaders in Australia's north are calling for further investigation into why dugong numbers appear to have declined by 50 per cent in the Gulf of Carpentaria, and what can be done to stop it.

Authorities hope that changing the frequency of acoustic alarms will be more effective at scaring off migratory mammals.

A dead whale that washed up near Victor Harbor has returned a negative result for bird flu.

From WA's capital to SA's far west coast, scientists have collated 50 years' worth of data on the southern right whale to track changes to breeding cycles. 

Scientists say no lampreys have been caught during their usual winter migration from ocean to river during two consecutive monitoring periods.

The number of dugongs in the Gulf of Carpentaria, one of the animal's most globally important populations, has halved in the past two decades, a decline scientists have called a "real shock".

Wildlife authorities were unable to save the humpback whale after it become beached on a sand bank in shallow water at Port Kennedy in Perth's southern suburbs. 

When Lilly Pollard flew her drone over a floating dead whale carcass, she captured a spectacular dinner party attended by one of the ocean's biggest apex predators.

Researchers confirm a 2024 coral bleaching event in remote, crocodile-inhabited Northern Territory waters was not picked up by the latest predictive technologies.

There are concerns the endangered Australian sea lion could be devastated by bird flu, with mass bird deaths believed to be linked to the virus found at key breeding locations.

An official government count reveals a devastating population crash.