Claudio Contreras / Yellow chub (Kyphosus incisor) blurred motion photograph, Yalku inlet, Caribbean Sea, Mexico, February

Solvin Zankl / Blue maomao (Scorpis violacea) shoal close to the shore, Poor Knights Islands, Marine Reserve, New Zealand, South Pacific Ocean, July.

Solvin Zankl / Blue maomao (Scorpis violacea) shoal, Poor Knights Islands, Marine Reserve, New Zealand, South Pacific Ocean, July.

Richard Herrmann / Halfmoon (Medialuna californiensis) school taking shelter under Giant Kelp (Macrocystis pyrifera), one hundred miles offshore from San Diego, Cortes Bank, California

Richard Herrmann / Halfmoon (Medialuna californiensis) school taking shelter under Giant Kelp (Macrocystis pyrifera) one hundred miles offshore from San Diego, Cortes Bank, California

Fred Bavendam / Stripey (Microcanthus strigatus), New South Wales, Australia

Fred Bavendam / Sea Sweep (Scorpis aequipinnis), Kangaroo Island, Australia

Pete Oxford / Blue-bronze Chub (Kyphosus analogus) school, Wolf Island, Galapagos Islands, Ecuador

Pete Oxford / Cortez Chub (Kyphosus elegans), Wolf Island, Galapagos Islands, Ecuador

Pete Oxford / Cortez Chub (Kyphosus elegans), Wolf Island, Galapagos Islands, Ecuador

Yva Momatiuk & John Eastcott / Dramatic lenticular clouds lit by rising sun, Moltke Harbor, South Georgia Island

Tui De Roy / Marine Iguana (Amblyrhynchus cristatus) large male swimming to the surface amid schooling Dusky Chubs (Girella freminvillei), Cape Douglas, Fernandina Island, Galapagos Islands, Ecuador