Andy Rouse / Galapagos green turtle (Chelonia mydas agassisi) underwater portrait, being inquisitive, note algae growing on head and shell

Nick Hawkins / Galapagos green turtle (Chelonia mydas agassizi) swimming above sea floor with shoal of fish in background. Off San Cristobal Island, Galapagos.

Alex Mustard / Three Galapagos green turtles (Chelonia mydas agassizii) feeding on seaweed growing on lava rocks in sunny shallow water. Floreana Island, Galapagos Islands, Ecuador. East Pacific Ocean.

Pete Oxford / Pacific Green Sea Turtle (Chelonia mydas agassizi) and snorkeler, Galapagos Islands, Ecuador

Pete Oxford / Pacific Green Sea Turtle (Chelonia mydas agassizi), Galapagos Islands, Ecuador

Pete Oxford / Galapagos green turtle (Chelonia mydas agassizi) swimming underwater, off Wolf Island, Galapagos, Ecuador, South America

Pete Oxford / Steel pompano fish (Trachinotus stilbe) cleaning Galapagos green turtle (Chelonia mydas agassizi) off Wolf Island, Galapagos Islands

Andy Rouse / Galapagos green turtle (Chelonia mydas agassisi) swimming in murky water of mangrove forest, Galapagos

Andy Rouse / Galapagos green turtle (Chelonia mydas agassisi) swimming, Galapagos

Andy Rouse / Galapagos green turtle (Chelonia mydas agassisi) resting in water, sleeping in mangrove forest, Galapagos

Pete Oxford / Galapagos green turtle hatchling (Chelonia mydas agassisi) heading for the ocean. Tortuga Bay, Santa Cruz Is, Galapagos

Pete Oxford / Galapagos green turtle hatchling (Chelonia mydas agassisi) crossing beach to the ocean. Tortuga Bay, Santa Cruz Is, Galapagos