Nudibranches
Fig. 20: Naked snails having sex under water — Nikon Coolpix 5400, Subtronic Mini strobe, Tulamben, Bali, Indonesia, 27 march 2005 — EXIF: E5400; Δt=1/125 s; f=13.5 mm; f/4.8; ISO 50; 2005-03-27 14:05:58