Glowing bacteria inside squids use light and chemical signals to control circadian-like rhythms in the animals

For years marine biologists have puzzled over what the mysterious vampire squid eats.

Silvery 3-metre cephalopod snapped in July 2012 near Ogasawara Islands.

An octopus simultaneously holds a shark at bay with one arm while simultaneously wrestling three zip ties of a baited canister.

The rather dark reputation of Humboldt squid has been readily reinforced by various wildlife television programs and other media which present these creatures as giant animals hungry for blood or ruthless monsters, uncompromisingly attacking their prey.

My first experience diving with mating squid was in September of 2000 during a rare late summer event off La Jolla Shores of San Diego in the U.S. state of California. To date, it still ranks as one of my all time favorite dives.

Many of the world’s deep-sea octopuses evolved from species that lived in the Southern Ocean, according to new molecular evidence reported by researchers at Queen’s University Belfast.

One of Australia’s most unique underwater events is facing a new challenge. The Australian giant cuttlefish mating aggregation—the world’s only large-scale cuttlefish gathering—has seen the first major decline in numbers since the event was protected from commercial fishing nearly 14 years ago.

Polarization vision is used to break the countershading camouflage of light-reflecting silvery fish researchers suggest.

Humboldt Squid found to spend many hours in a band of oxygen-poor water at a depth of more than 500 m in the California current.