Palau created the world's largest marine sanctuary, but keeping illegal fishing fleets at bay is not easy.
Palau's reef is one of the largest living structures on Earth and home to more than 1500 species of fish.
The remote islands of Raja Ampat in the Indonesian archipelago are home to the secretive giants of the ocean - manta...
With the highest number of coral and fish species on Earth, Indonesia has the richest reefs on the planet.
Buried beneath a seabed littered with trash, a community of strange creatures thrives against all odds.
Researchers are using nature to help keep the Maldives from disappearing.