These northernmost islands are only visited by live-aboard dive boats and consistently rank among the world’s top-10 dive sites. In one single dive at the Arch at Darwin Island it is possible to find schooling hammerhead sharks, Galapagos sharks, large pods of dolphins, thick schools of skipjack and yellow fin tuna, big eye jacks, mobula mobular rays and silky sharks. From June to November, whale sharks in groups of up to eight different individuals in one single dive are almost guaranteed. Wolf Island is also a good location for schooling hammerhead sharks, large aggregations of Galapagos sharks and occasionally whale sharks. Dolphins, large schools of tuna, spotted eagle rays, barracudas, sea lions and sea turtles are also common, and hundreds of moray eels, many of them free swimming on the bottom. As the water here is several degrees warmer than the central islands, many representatives of Indo-Pacific underwater fauna can also be spotted.