Green turtles eat plants. In fact, they are the only turtles that eat plants. Juveniles and subadults eat many things including man-o-war and jellyfish. When they reach 20 to 25 centimeters they began feeding on algae or seagrasses. You can find more information here: http://www.2fla.com/greenturtle.htm...

Here is what you will find if you were browsing a green turtle's dinner menu. You will find mainly two entrees, sea grasses and algae. Yes, no appetizers.