Basslets (Pseudanthias sp.) hide between corals when divers or predators approaching. But if you stop breathing they come out carefully and try to get some food – in this case short before sunset.
Marsa Alam, Egypt, Red Sea
Canon EOS 5D MKII, 4.0/17-40mm L USM, Seacam housing, Seaflash, f9,1/60s, 100 ISO