The Galapagos Islands have never been connected with the continent. Gradually, over many hundreds of thousands of years, animals and plants from over the sea somehow migrated there and as time went by they adapted themselves to Galapagos conditions and came to differ more and more from their continental ancestors. Thus many of them are unique: a quarter of the species of shore fish, half of the plants and almost all the reptiles are found nowhere else. In many cases different forms have evolved on the different islands. You can discover the wildlife of the Galapagos on a cruise, sailing to several islands or staying on one island and taking day trips to others.
Those who are not able to visit the Galapagos may wish to visit Isla de la Plata instead. This small island has a large diversity of animal species including several species of booby and the South American sea lion.