In May, retired American naval officer Victor Vescovo dived nearly 10, 927m in a submarine to a point in the Pacific Ocean’s Mariana Trench regarded as the deepest place on Earth.

THE celebration tomorrow of World Oceans Day underlines the major role they play as the lungs of our planet, providing most of the oxygen we breathe.

Discovering new species and protecting them is all in a day’s work for Professor Louise Allcock, as she explores one of the planet’s last great frontiers, writes Lorna Siggins.

Footage of two killer whales — orcas — taken off Dublin on Saturday showed the grace and power of these magnificent, but endangered animal

A sensitive underwater habitat and new corals have been discovered in the ocean near Ireland.

One of my sons received an underwater camera with video for Christmas. They’re not expensive, but to make use of them you’d best be somewhere with acceptable sea temperatures.

THE kraken of Norse legends and Scylla and Charybdis of ancient Greece were not just mythical beasts, writes Richard Collins. 

Two giant sharks, which together weigh more than the entire Munster pack which started last weekend’s Pro12 final, have been caught off the Clare coast.

Warmer, more acidic oceans will be a catastrophe for our planet. The time to act is now, write José Maria Figueres, Pascal Lamy and John D Podesta.

Thousands of jellyfish washed up at Fanore Beach in Clare last Friday.

Scientists scanning the rocky ocean floor off Southern California could not contain their excitement when they spotted a bright purple, googly-eyed stubby squid.

A scuba diver, stranded 30 miles from the coast, captured what he believed would be his last words.

Marine mammal, birds, fish and reptile populations have almost halved since 1970, according to a report which is a “wake-up call” to tackle the crisis in the world’s oceans.

Talk about a sinking feeling…

Huge floating ‘garbage patches’ in the Pacific and North Atlantic are a threat to wildlife caused by our consumer culture, says Robert Hume

FISH and birds of Irish coastal waters seem to be moving house, writes Richard Collins.