[vimeo http://vimeo.com/54105345 w=700&h=390] Muck diving gets its name from the conditions - sediment and mud and so on. Calm and shallow, but low visibility, but then it's the muck that makes it interesting, as it's the perfect habitat for unusual, exotic and juvenile organisms that make their homes in the sediment and "trash" that compose a muck dive. Creatures like colorful nudibranchs, anglerfish, shrimp, blue-ringed octopus, and rare pygmy seahorses.
Lembeh Strait is near Sulawesi in Indonesia.
You're going to want to view this "large" or full screen if you've got the bandwidth.
Khaled Sultani, who made this, says: "Lembeh Strait diving - simply one of the best place in the world for muck diving and macro photo+videography. Shot with Sony Cx550 with Light & Motion housing; with sola lights."
The song is "The awakening of a woman" by Cinematic Orchestra.
Jason de Caires Taylor creates life-size cement sculptures of people and submerges them into the waters of South America. As time passes the sculptures become part of the underwater landscape and slowly become artificial reefs ripe with marine life. Explore his 
These pictures were taken at the first ever King Of The Bubble contest, which requires contestants to produce the largest, clearest, longest-lasting and most perfectly rounded rings. It's a specially-built pool in Brussels, Belgium, 100ft deep (the deepest in the world).