This picture has not been colored or altered in any way. This variety of staghorn coral really is that blue under water.

2003:09:02 12:48:17
Island: Satonda
Dive Site: Sand Box
Speed: 1/50 sec
Aperture: f8.0
ISO: 64
Exposure Compensation: -1.3
Exposure Program: Program
Focal Length: 12 mm
Flash: