The black coloring of the iguana helps it absorb heat from the sun. Marine iguanas can grow to be up to five feet in length and has a body shape similar to that of the desert iguana. Marine iguanas are usually found in large groups. Human use of the turtle for food and commercial use has greatly effected the number of sea turtles remaining in the wild. Humans have also disrupted breeding with activity on or near nesting sites.
Sea turtle are among the most popular and familiar of the marine animals.
Their size ranges from the green sea turtle measuring a few feet in length to over six feet long and several hundred pounds. Sea turtles differ from land turtles in a variety of ways. Sea turtles have flattened streamlined shells that are not as structurally solid as terrestrial forms and facilitate movement in the water. Their heads can not be pulled into their shells and their front limbs are rigid flippers while the hind limbs are paddles that aid in steering. These hind limbs also aid females in digging nests on the beach.