Fig. 113: Diving in the Saki Blue hole on Espiritu Santo. The freshwater of this source here is filtered through porous stones. The bottom is very soft silt. Espiritu Santo, Vanuatu. — EXIF: Nikon D200; Δt=1/100 s; f=10.5 mm; f/2.8; ISO 200; 2010-07-27 1:23:22
