This animal was first to emit light—540 million years ago
Animals went bioluminescent 273 million years earlier than scientists previously thought and in a completely different species.
"Incredible" clip shows scientist and octopus "communicating" in the wild
The footage comes from an upcoming National Geographic documentary series produced by James Cameron.
Sharks seen "adapting" to different environments for first time
"Sharks are adapting their movements and routines to suit their local environment, rather than behaving the same way everywhere," researcher Oliver Jewell said.
Baby great white sharks are menacing California beaches
Scientists solved a long-standing mystery relating to great white sharks and where the young spend their time.
"Wildly different" shark that can live for centuries at risk
A mysterious species of shark that lives at depths of up to 6,000 feet is at risk of being overfished.
Better Planet
'Killer Cold Events' on the rise
Cold events in the oceans have increased over the past 30 years, a study found, and it is severely affecting species like sharks.
Scientists discover 50 new deep-sea species near Easter Island
The discoveries "have unveiled constitute a dramatic example of how little we know," researcher Javier Sellanes said.
Better Planet
Great Barrier Reef update on "extremely worrying" heatwaves
If the global climate continues to warm, above 3°C pre-industrial levels, this cooling barrier could disappear meaning even more mass bleaching.
Freaky mass of gloop washes up on beach
The bizarre glob of slimy matter is thought to be a decomposing whale carcass.
Whales caught in rare mating ritual
"It was a spectacular display of massive power and grace, one of the great sights in nature," researcher Peter Gill said of the experience.
Whales find "unusual" way of defending themselves against orca attacks
"They actually have this really reddish coloured poo," marine biologist Jennah Tucker said. "It's called defensive defecation."
New "ghost shark" species with giant eyes found thousands of feet deep
Creatures are distant cousins of sharks and rays, with their most recent common ancestor having lived over 400 million years ago.
Great white shark found decapitated on beach
The shark is thought to have been caught out at sea then brought to shore and decapitated, with its head still remaining missing.
Fishing gear risking extinction of endangered whale
Female North Atlantic right whales that had been entangled were found to be 47 percent less likely to breed than those that had not.
Florida mystery as critically endangered fish wash up dead and dying
These rare prehistoric-looking fish have been spotted thrashing around near the shores of the Florida Keys, with 20 specimens having been found dead.
Dolphin drowned in beach's controversial shark net, video shows
Non-target animals including rays, turtles, and marine mammals, such as dolphins and seals, have been caught in New South Wales shark nets.
"Baffling" new species found in ocean trench defies identification
"It looks like we have a great haul of new, undiscovered species," researcher Alex Rogers said. "We will be north of 100 new species."
Halloween "witch's finger" found in turtle's gut
"It's likely that turtles ingest the plastics that mostly closely resemble their foods," researcher Emily Duncan said.
Secrets of hammerhead sharks revealed in "very rare" images
A series of pictures show how the hammerhead starts to widen halfway through the sharks' gestation period.
Seal attacks eagle in photos of "never before seen" tactic
A birdwatcher caught a photo of the seal leaping from the water and spitting water at the predator.
Mercury levels in tuna aren't decreasing
Mercury poisoning can affect the nervous system, causing problems with fertility and blood pressure, as well as developmental delays in young children.
Great white shark washes up on beach, shocking crowd
The rare stranding occurred after the great white shark thrashed in the shallows off a popular Australian beach.
Video reveals top predators "lit up" as they take turns to attack prey
A new study documented stripes on each marlin getting brighter when a fish went to attack its prey.
Great white shark found dead on Florida beach
The shark was 13 feet long and weighed 1,500 pounds.
Humpback whales are struggling to communicate due to noisy humans
Scientists found that unique and vital vocalizations made by whales are potentially drowned out by the noise of humans.
Better Planet
Florida corals ravaged in wake of record-breaking marine heatwave
Researchers found that less than 22 percent of 1,500 staghorn corals were still alive across sites in the Florida Keys.
Shark attacks man in river, rips off foot and most of calf
Bull sharks usually live in the open ocean, but they are known for their ability to migrate up rivers, which can sometimes mean they become a threat to humans.
First-ever image of a newborn great white shark revealed
"No one has ever been able to pinpoint where they are born, nor has anyone seen a newborn baby shark alive," filmmaker Carlos Gauna said.
These sharks don't have to keep moving to stay alive: "Blew our minds"
"I've always thought of gray reef sharks as a clear example of a shark species that needs to swim to breathe," a researcher said. "Clearly not."
Biologists find brainless brittle stars can learn—but we "don't know" how
"Knowing that brittle stars can learn means they're not just robotic scavengers like little Roombas cleaning up the ocean floor," author Julia Notar said.