Long-beaked Common Dolphin (Delphinus capensis) surfacing in the Gulf of California (Sea of Cortez), Mexico.

Long-beaked Common Dolphin (Delphinus capensis) surfacing in the Gulf of California (Sea of Cortez), Mexico.

California Sea Lion (Zalophus californianus) mother and pup on Los Islotes in the Gulf of California (Sea of Cortez), Mexico.

San Esteban Spiny-tailed Iguana (Ctenosaura conspicuosa), an endemic iguana found only on Isla San Esteban in the Gulf of California (Sea of Cortez), Mexico

Long-beaked Common Dolphins (Delphinus capensis) surfacing in the Gulf of California (Sea of Cortez), Mexico.

Humpback whale Megaptera novaeangliae in the lower Gulf of California Sea of Cortez, Baja California Sur, Mexico

Adult Heermann's Gull (Larus heermanni) on their breeding grounds on Isla Rasa in the middle Gulf of California (Sea of Cortez), Mexico. 95% of the world's population of this species nests on this tiny island.

Sharpnose Popperfish. Sea of Cortez. Baja California. Mexico. Pacific Ocean.

San Esteban Spiny-tailed Iguana (Ctenosaura conspicuosa), an endemic iguana found only on Isla San Esteban in the Gulf of California (Sea of Cortez), Mexico

Heermann's Gull (Larus heermanni) on their breeding grounds on Isla Rasa in the middle Gulf of California (Sea of Cortez), Mexico. 95% of the world's population of this species nests on this tiny island.

Adult Blue Whale (Balaenoptera musculus) surfacing in the Gulf of California (Sea of Cortez), Mexico.

Red-billed Tropicbird (Phaethon aethereus) in flight over Isla San Pedro Martir in the Gulf of California (Sea of Cortez), Mexico.

Gulf of California. Sonora, Mexico