One of the smallest islands in the archipelago, Mosquera situates itself between North Seymour and Baltra Island. It consists of many coral reefs, making it a great site to snorkel and observe marine life. It is home to one of the largest colonies of sea lions in the Galapagos archipelago with occasional whale sightings around the islet. It boasts unique wildlife like marine iguanas, blue-footed boobies, and Sally Lightfoot crabs.