This unusual lizard typically lives on rocks around the coast in tropical climates, diving into the sea occasionally to feed on underwater algae or seed weed. They have short blunt snouts and razor-sharp teeth, which assist them in scraping food off of the rocks as well.
Marine iguanas are also strong swimmers, and males defend groups of females against rival males during mating season.
This particular large critter claimed his domain just near a local restaurant and dive shop near the water on Bonaire. We observed him chasing other lizards away so he could feast on french fries, fish scraps and other tidbits dropped on the ground by diners and divers alike.