Being an isolated island, Iceland was long home to birds and fish before the first human ever set foot on its shores. Travelers are most impressed with Icelandís fantastic population of fish. The lakes and rivers are filled with salmon and trout, and the seas surrounding the island are a great source of varied fish species, though long years of over fishing have effected the marine population. Before human settlement, the only mammal that existed on the island was the arctic fox. With humans, however, came various domestic and farm animals, and other creatures such as rats and mice. Reindeer and mink were later introduced, and many reindeer still live in the highlands of the northeast. On an Iceland cruise donít expect to see any wild reptiles or amphibians. Due to Icelandís latitude and climate, the number of insects is low relative to other parts of the world, and these factors have also made it impossible for the country to be home to any native reptiles or amphibians.