The green turtle is so called because the fat it contains under its shell is green. Their head is very small compared to their body, they are very good swimmers since their fins have a paddle shape. The color of their shell is very variable according to the climate in which they grew up, these can be presented in olive, black and brown tones. Also the green turtle is considered one of the largest species since its length is between 28 to 60 inches and its weight is between 150 to 420 pounds.