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. Turtles spend most of their lives in the water but they must return to land to bear their young. The males and females mate in the water near the shore.