The best-known attractions of the islands are the tame seabirds such as boobies and frigatebirds, the marine iguanas, the huge tortoises, and the sea lions and penguins. But of all the wildlife attractions, the last two are by far the most fun and most beautiful. Specifically, one should make sure to include snorkeling with the sea lions and penguins in the transparent, tropical waters of the islands. Only 2 of the 18 main islands have good populations of the penguins, while San Cristóbal Island has the largest population of the sea lions, which also can be found in some numbers on all the main islands. It is important to talk with us about how to build your itinerary around those two species while staying on land on one of the three islands that offers good lodging. You easily can add many of the other classic Galápagos species to an itinerary that starts by guaranteeing great experiences snorkeling with those two species, which are so exceedingly beautiful to watch swimming underwater.