Lembeh Strait has some of the finest diving in North Sulawesi. Lembeh has fast developed a reputation as being the place for muck. Muck diving lovers will find unusual and rare critters on black sand bottoms, such as frog fish, seahorses, shrimps, nudibranch and the stunning mimic octopus.
Lembeh is a paradise for macro photographers, as you can search for those tiny wonderful creatures in the muck to get some great macro shots. But there are also many other excellent dives available. For example the dive spot Nudi Falls where hundreds of nudibranchs are holding on to a steep wall.
There are five shipwrecks (two of them Japanese WWII ships) and an impressive array of underwater topography, including pinnacles and verdant soft and hard coral gardens. Anyhow, it is the plain black sand sites that make the area famous with their abundance of strange and beautiful critters.