Pete Oxford / Palo Santo (Bursera graveolens) trees growing in arid landscape, Tagus Cove, Isabela Island, Galapagos Islands, Ecuador

Ross Hoddinott / Great blue heron (Ardea herodias) silhouetted against evening sky, Tagus Cove, Galapagos, Ecuador. April.

Jeff Rotman / Hairy hermit crab (Aniculus elegans) camouflaged on coral reef, Tagus Cove, Galapagos Islands, Pacific Ocean.

Staffan Widstrand / Ecotourists on a jetty and basking Galapagos Sea Lions (Zalophus wollebaeki). Tagus Cove, Isabela, Galapagos, Ecuador, April 2010.

Pete Oxford / Balloonfish (Diodon holocanthus) Tagus Cove, Isabela Island. Galapagos Islands, Ecuador, South America

Pete Oxford / Harlequin Wrasse (Bodianus eclancheri), Tagus Cove off Isablea Island, Galapagos Islands,

Pete Oxford / Diamond Stingray (Dasyatis brevis) in murky water, Tagus Cove, Isabela Island, Galapagos Islands,

Pete Oxford / Harlequin wrasse (Bodianus eclancheri), Tagus Cove off Isablea Island, Galapagos Islands,

Pete Oxford / Balloon fish (Diodon holocanthus) Tagus Cove, Isabela Island, Galapagos Islands, Ecuador, South America

Pete Oxford / Aerial view of Palo santo trees (Bursera galapageia) growing in the arid zone of Tagus Cove, Isabela Island around the circular crater of Darwin's Lake, Galapagos

Pete Oxford / Palo santo trees (Bursera galapageia) and cinder cone in the arid zone of Tagus Cove, Isabela Island, Galapagos

Pete Oxford / Palo santo trees (Bursera galapageia) growing in the arid zone of Tagus Cove of Isabela Island. Galapagos Islands