Changes to the Southern Ocean's sea ice belt could mean see the global level rising several metres, says a new study which has shed more light on an ice-age mystery.

A sonar early warning system is being developed to stop swarms of jellyfish shutting down Britain’s nuclear power plants.

It was merely fanciful, of course, to imagine that going to meet William Trubridge, the world record holding freediver, would be like going to meet a merman.

The consortium that pumps gas from the Maui offshore platforms appears to have been forgivably naughty.

Police have now officially ended the search for missing 5-year-old Jack Dixon, who was washed out to sea at Mt Maunganui.

Mt Maunganui surf lifesavers say they will keep looking for Jack Dixon "for as long as it takes" despite no sign of the missing boy for a week.

Rogue waves - mountainous swells that form at sea without warning - have been blamed for countless maritime disasters.

As $100 million of shiny new craft go on display at Auckland's On the Water Boat Show, the Hauraki Gulf has received a damning report about its health.

New research has confirmed waters off Auckland are crucial breeding grounds for a keystone shark species.

The world's leading expert on the poisoning of the oceans has described how he was "utterly shocked" by the true amount of plastic floating on the sea, warning that it potentially posed a bigger threat to the planet than climate change.

Centuries of over-exploitation of whales for their meat and blubber has seen populations of most species plummet. But with no small amount of irony, the tables have turned with research discovering that we need whales for a healthy marine ecosystem.

The moa were driven to extinction due to human activities - over-hunting and habitat destruction. Here are 10 other animals mankind has wiped out.

Global warming is melting sea ice so fast that more than half of Antarctica's population of emperor penguins are set to be wiped out by the end of the century, according to alarming new research saying they should be listed as an endangered species.

"Sea," said King Canute, the 11th-century Danish King of England, "I command you to come no further!"

The social media phenomenon known as the Beached Az whale has been killed off by its creators to highlight the plight of marine life ahead of World Oceans Day.

Hollywood director James Cameron is among those lamenting the loss of a robotic research submarine which imploded in the Kermadec Trench.

MetService is pushing further into global markets with a business aimed at more accurate forecasting for the shipping and oil and gas industries around the world.

One of the most "disastrous breeding seasons" in recent years has hit endangered yellow-eyed penguin colonies along Otago's coast.

New Zealand's endangered yellow-eyed penguin have been found to follow the line of swooping seabirds - literally - when it comes to reaping the food stirred up by trawlers.

'Wow, this guy's a whopper,' said experts of a 1.5m monster jellyfish that washed up on a Hobart beach last month. So what does its sting feel like?

It all began in December 2012, when Jose Salvador Alvarenga, an El Salvadorian fisherman, boarded his 7m fibreglass fishing boat in the village of Costa Azul on the coast of the Mexican state of Chiapas.

Sections of the Northwestern cycleway will most likely be underwater and low-lying sections of Auckland's motorway network are at risk of flooding during high king tides forecast for later this week.

Asteroids like the one that wiped out the dinosaurs on Earth could have shot life to Mars or the moons of Jupiter and Saturn, US scientists have said.