The picture is part of "Costa Rica Blue: The Underwater Guide," a book that calls itself "the definitive travel guide to Costa Rica's underwater world."
Robert Nunes is a commercial fisherman who actively defends his peers in Costa Rica’s commercial fishing industry. He volunteers a lot of his time with Mauricio Gonzalez, director of the Camera de Palangreros (or the chamber of longliners) traveling the country lobbying for fisherman’s rights.
A group of of scientists led Dr. Larry Crowderheads from the Hopkins Marine Station at Stanford University, catch fish to better understand and manage ocean pelagics like sailfish and marlin.