Sandesh Kadur / Large scaled pit viper (Trimeresurus macrolepis) head profile, water droplet below, Western Ghats, Southern India

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

James Christensen / Large-scaled Black Tree Snake (Chironius grandisquamis) in defensive posture, Mindo, Ecuador

Franco Banfi / Scuba diver and great rockfish (Scorpaena scrofa) on Brioni Steamship wreck, Vis Island, Croatia, Adriatic Sea, Mediterranean

Franco Banfi / Great rockfish (Scorpaena scrofa) on Brioni Steamship wreck, Vis Island, Croatia, Adriatic Sea, Mediterranean

Sandesh Kadur / Lizard (Calotes grandisquamis) head portrait, Western Ghats, India

Sandesh Kadur / Lizard (Calotes grandisquamis) on branch, Western Ghats, India

Ian Lockwood / Large Scaled Pit Viper (Trimeresurus macrolepis) in a shola forest at an altitude of 2000 meters, endemic, Western Ghats, India

James Christensen / Large-scaled Black Tree Snake (Chironius grandisquamis) with injury, Andes, Ecuador

James Christensen / Large-scaled Black Tree Snake (Chironius grandisquamis) tongue-flicking, western slope of the Andes Cloud Forest, Mindo, Ecuador