Green sea turtles are not green, but rather are brown or mud-colored with a mottled carapace, their name being derived from the color of their fat. Only juveniles have been found in New England waters, and in size they are difficult to tell apart from the juvenile Kemp's ridleys in our waters. Our juvenile greens range from 10 to 18 inches long, also about the size of a dinner plate and weighing approximately five pounds. In New England waters, stranded young green turtles have been found to be mostly herbivorous, as are adults.