Galapagos marine iguanas are the world’s only marine lizards (4). They inhabit the Galapagos Islands and, in the absence of mammalian predators, have adapted well to the harsh marine environment. Superficially they resemble large lizards, though they have evolved blunt noses for grazing on seaweed, laterally flattened tails to assist swimming, and powerful limbs with strong claws to help them cling to rocks (5).

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