Graham Eaton / Shoal of Hardyhead Silverside (Atherinomorus lacunosus) hunted by a shoal of Bluefin Trevally (Caranx melampygus) along a shoreline. Komandoo Island, Maldives, January.

Alex Mustard / Yellow striped scad (Selaroides leptolepis) school swim around a leg of Arborek jetty, Arborek Island, Raja Ampat, West Papua, Indonesia

Tony Wu / Yellowstripe scad (Selaroides leptolepis) shoal swimming under the jetty at Samarai Island in Milne Bay, Papua New Guinea

Tony Wu / Yellowstripe scad (Selaroides leptolepis) shoal swimming under the jetty at Samarai Island in Milne Bay, Papua New Guinea

Alex Mustard / Slender grouper (Anyperodon leucogrammicus) exploiting the confusion caused by and Orange spotted trevally (Carangoides bajad) hunting silversides (Atherinidae) to plan an ambush. Raja Ampat, West Pap...

Alex Mustard / Silversides (Atherinidae) above yellow striped scad (Selaroides leptolepis) schooling below a wooden jetty while a man looks on. Yanggefo Island, Gam Island, Raja Ampat, West Papua, Indonesia. Dampier...

Alex Mustard / A long exposure of a school of Yellowstripe scad (Selaroides leptolepis). Yanggefo Island, Gam Island, Raja Ampat, West Papua, Indonesia. Dampier Strait, Tropical West Pacific Ocean.

Shane Gross / Colorful coral reef scene with feather stars (crinoids), magenta slender anthias (Luzonichthys waitei) and a School of Bigeye jacks / trevally (Caranx sexfasciatus), Kimbe Bay, Papua New Guinea.