Keen divers will likely know the country's many prime spots for getting underneath the waves. Raja Ampat in far-flung West Papua and Lembeh in North Sulawesi are rightfully two of the most famous.

Enchanting. Let’s go on one final dive. It’s dusk in Lembeh. You’re kneeling by a rocky slope. In front of you, swimming cheek to cheek, a pair of small fish are spawning. An eel is curled ...

Dr. Schnell and other experts meet several amazing octopuses in places such as Canada’s Vancouver Island and Indonesia’s Lembeh Strait. But there’s a particularly touching relationship betwe ...