Alex Mustard / Aggregation of Golden jellyfish (Mastigias sp.) in a marine lake in Palau, the golden colour of this species comes from symbiotic algae in its tissues. Jellyfish Lake, Eil Malk island, Rock Islands, P...

Tony Wu / Twinspot snapper (Lutjanus bohar) shoal rushing up to spawn, releasing a cloud of milky white sperm and eggs in the water column. Caroline Islands, Palau, November.

Pascal Kobeh / Red snappers / Two-spot red snappers (Lutjanus bohar) mass shoal of fish spawning, Palau, Philippine Sea. A few black and white snappers (Macolor niger) have crawled into the school to eat the eggs.

Alex Mustard / Bohar snappers (Lutjanus bohar) breaking up into smaller groups to spawn. The fish swim short arches above the main group as they release clouds of gametes. Shark City, Ulong, Rock Islands, Palau. T...