Marine iguanas

Marine iguanas

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Credit: GEORGETTE DOUWMA/SCIENCE PHOTO LIBRARY

Caption: Marine iguanas (Amblyrhynchus cristatus) resting on a rock. These aquatic reptiles feed on marine algae, often diving deep underwater at high tide. Because they cannot regulate their own body temperature, and because they spend long periods of time in cold water, they compensate by basking in the sun to warm up. Marine iguanas consume high levels of salt whilst feeding. They regulate their salinity levels by excreting salt crystals through a nasal gland. Marine iguanas are found in large colonies, only on the Galapagos Islands. Photographed on Baltra, in the Galapagos.

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Keywords: amblyrhynchus cristatus, animal, aquatic, baltra, basking, body temperature, endangered, galapagos islands, herbivore, herbivores, herbivorous, iguana, iguanas, island, lizard, lizards, marine, nature, pacific, rare, regulating, regulation, reptile, reptilia, rock, sunbathing, sunning, swimmer, swimmers, thermoregulation, threatened, three, trio, wildlife, zoology

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