Horn corals
Fig. 20: Horn corals and a swarm fish beneath the water surface. — Dunia Kecil, Wajil Batan, Rajat Empat, Indonesia, Nikon Coolpix 5400, Fischaugen-Vorsatz, March 15, 2005 — EXIF: E5400; Δt=1/81 s; f=24 mm; f/5.2; ISO 50; 2005-03-15 15:17:53