The endemic Galapagos marine iguana (Amblyrhynchus cristatus) feeding underwater in the Galapagos, UNESCO World Heritage Site, Ecuador, South America

galapagos marine iguana amblyrhynchus cristatus underwater feeding algae marine life endemic species ecuador biodiversity aquatic habitat reptiles nature wildlife ocean ecosystem charles darwin iguana behavior swimming natural environment vibrant colors animal behavior conservation tropical fauna geology snorkeling scuba diving coastal marine ecosystems kelp rocky reefs food sources adaptation unique species south america natural habitat underwater scenery oceanography endemic reptiles environmental science sea life aquatic plants natural history ecological diversity underwater exploration oceanic environment snorkeling spot natural wonders marine biodiversity galapagos islands