Frank Hurley, fish underwater, 1922. Coloured lantern slide.
Australian Museum AMS320/V3242
In the days before scuba technology, the celebrated photographer sought to capture the beauty of the reef by placing corals in an aquarium and shooting them. But under stress, they released algae.
Vladi333 / shutterstock
Oxygen flooded the atmosphere for the first time and then ... nothing. Or so we thought.
Coral reefs contain an intricate web of predators and prey.
Researchers have just discovered a new species of bacteria that cranks out a deadly toxin. In a common arrangement in the marine environment, a slug and alga both use this toxin for their own defense.
outdoorsman / shutterstock
Algae at the bottom of the Arctic food chain relies on sea ice.
Feeding pigs seaweed could make them, us and the planet healthier without contributing to antibiotic resistance in bacteria.
Tiny chemical clues in the ocean reveal how its role as a carbon store is changing.
Going all the way back: rules for the Murray Darling Basin are in Australia’s constitution.
Public confidence in the institutions in charge of the Murray Darling Basin has plummeted – with good reason.
Dead fish are a source of food for bacteria, which then extract oxygen from the river.
Hundreds of thousands of fish have died in low-oxygen water. Here's what actually happened to the oxygen, and why we might see more deaths in the coming weeks.
An aerial photo of a 2009 algae bloom in the Murray Darling Basin.
MINISTER PHIL COSTA'S OFFICE/AAP
Algae blooms have killed hundreds of thousands of fish in the last two weeks, but what exactly are they and how do we get them under control?
Algae cover the surface of the Caloosahatchee River at the W.P. Franklin Lock and Dam, July 12, 2018, in Alva, Florida.
AP Photo/Lynne Sladky
Red tide and a blue-green algae outbreak are fouling hundreds of miles of coast, killing fish and driving tourists away from beaches. Some of the causes are natural, but human actions play a big role.
Cyanobacteria filled the ancient oceans and used chlorophyll to harvest the sun’s energy.
Did you recently hear news that Earth's oldest pigments were hot pink? That's not quite right. When they were in living bacteria a billion years ago, they were performing photosynthesis – and green.
Cyanobacterial blooms and algae are common in water bodies around the world. However, Australia is yet to monitor the growth of neurotoxins in our algae.
A toxic chemical produced by algae and linked to motor neuron disease has been detected in NSW rivers. Its presence - long suspected but now confirmed - could be linked to a disease hotspot in the Riverina.
The ocean is getting warmer and more acidic but changing our diet could help us cope.
Pools at an algae farm in Borculo, east Netherlands.
AP Photo/Arthur Max
Scientists and government agencies have been studying biofuel production from algae for years. Research points toward a more affordable and efficient production process that recycles water.
Algae could be the key to a new type of biofuel.
The right kind of algae can be converted to biofuel, and there are potential side benefits for carbon capture.
The climate change-mitigating dream turns out to be a green damp squib.
Harmful algae bloom in Lake Erie, Oct. 13, 2011.
NASA Earth Observatory
Nitrogen and phosphorus are polluting US waters, creating algae blooms and dead zones. New research confirms that voluntary steps are failing in the Gulf of Mexico and unlikely to work in Lake Erie.
Furious winds keep the McMurdo Dry Valleys in Anarctica free of snow and ice. Calcites found in the valleys have revealed the secrets of ancient subglacial volcanoes.
Melting ice from Antartica could feed vast plankton blooms, trapping carbon in the ocean. To understand this complex mechanism, researchers looked at volcanoes deep under glaciers.
A tank can give a good idea of what will happen out in the wild.
A new study suggests the benefits of a boost to marine plant growth from increased carbon dioxide will be cancelled out by the increased stress to fish species.
Four organisms that show nature isn't so easily categorised.