Lembeh Straits is known as the muck diving capital of the world, and is one of the few places in the world where you will see the elusive hairy frog fish, pygmy sea horses, larger sea horses like the thorny seahorse, mimic octopus, wunderpus and flamboyant cuttlefish to name a few. Muck dives consist of sandy black slopes with good visibility, approximately 10-15m. It is a macro-photographers dream, as the slopes are teaming of all sorts of fascinating critters and the black sand reduces back-glare.