The snail once found on islands in the Pacific Ocean became wiped out after another mollusc was introduced in the 1970s.

BBC: Partula tree snail

Marwell Zoo has become home to a further four species of Partula tree snail, which originate from islands in the Pacific Ocean and are extinct in the wild.

BBC: Partula tree snail

Perhaps most important, though were five mummified Unangan hunter-gatherers from the Aleutian Islands in the North Pacific ocean.

FORBES: What The Hardened Arteries Of Ancient Mummies Mean For Picking A Diet

Tagging studies show that the scalloped hammerhead gathers at fixed sites around islands in the Eastern Pacific Ocean during its long-distance migrations.

BBC: RELATED BBC SITES

The islands are isolated volcanic outcrops in the eastern Pacific Ocean, where the introduction of novel species quickly destabilises the archipelago's ecosystems.

BBC: Birds at risk reach record high

The Galapagos -- 19 islands that lie 600 miles west of Ecuador in the Pacific Ocean -- are home to species of animals found nowhere else on Earth.

CNN: Close encounters in the Galapagos