Megalodons are the latest Hollywood monster to leap out of the fossil record, but what else is lurking in prehistoric seas?
Strange frond-like sea creatures are among the planet's earliest animals, but new research dates them and the entire animal kingdom to much earlier than first thought.
Elusive and mysterious by nature, ordinary people are revealing the secrets of the UK's octopuses.
Tech fixes to environmental problems are guaranteed to grab attention, but real change for the planet requires community organising.
Marine heatwaves have had little attention until recently, but they're already having large effects.
At Kīlauea in Hawai'i, a recent volcanic eruption has created some of the most spectacular sights in nature. But also danger for those around it.
Biologists are finding new evidence that these ocean invertebrate grazers don't just ingest whatever they catch. They can actually be picky eaters – and their choices might influence ocean food webs.
Diving without oxygen tanks requires you to enact some very weird and very strange and not all that well understood physiological feats just to stay alive.
Research suggests a new threat to life on Earth from the meteorite's crash: Via seismic waves, the impact triggered massive undersea eruptions, as big as any ever seen in our planet's history.
Scientific fieldwork that happens underground and underwater in spectacular but dangerous caves opens a window on a largely unknown world.
Lucky Bay on WA's south coast has been scientifically declared to have the whitest sand in Australia. But if you think your local beach can take the title, we want to hear from you.
The sea remains the least explored habitat on our blue planet.
Seagrass medows support rich biodiversity. New research shows what you can do to protect them.
Every year buoyant bundles rise from a spawning coral, giving the impression of an upside-down snowstorm.
It seems almost inevitable that deep sea mining will open a new and substantial chapter of humanity’s relationship with the oceans.
Reef Life Survey, a citizen science project where hundreds of volunteer scuba divers survey thousands of ocean sites, has revealed new insights into marine mysteries.
As well as thousands of deaths and huge destruction, Japan's 2011 tsunami carried potentially invasive species _en masse_ across an entire ocean.
The last ice age locked atmospheric carbon dioxide into oceans, which has major implications for how the oceans and carbon dioxide may be linked in the future.
Ancient whales were neither gentle, nor giants: they were smaller than those of today and judging from their teeth, a lot meaner.
Sharks can't sneeze like we do, but they can do other cool tricks -- like making their stomach stick out of their mouth to get rid of unwanted stuff.