The marine iguana, found only on the Galapagos Islands, has the unique ability to forage for food in the sea. Researchers theorize that land and marine iguanas evolved from a common ancestor since arriving on the islands from South America. (Photo: Tony A

Tortoises

Perhaps the most famous animal endemic to these islands, the Galapagos giant tortoise can live to be over 100 years old and weigh nearly 900 pounds. (Photo: Tony Azios)

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