Aboard Palau Siren, a yacht that visits the Palau archipelago, you'll see hundreds of sharks, tuna, corals and other marine life on a first-class adventure.

The Aggressor Fleet of liveaboard dive ships yesterday announced that it will extend its service to Raja Ampat beginning August 2015.

Beautiful but deadly, this tiny critter is a close cousin of the blue-ringed octopus. Learn how pro photographer Jeffrey Chua de Guzman got the shot.

Philippines

Papua New Guinea

Micronesia

Palau

Guam

French Polynesia