Strange, but the green sea turtle is not that green．It’s certainly not as green as a tree．In fact, its shell is nearly black or brown．The largest hard-shelled sea turtle is between 200 and 300 pounds heavy and a shell is between 36 and 43 inches long．But its head is smaller than other turtles．

　　Little baby green sea turtles are only two inches long．As the turtle grows up, its shell keeps mostly black while the body turns orange or brown．Young turtles like living in the sea, especially in areas with lots of sea grasses．

　　Green sea turtle, like all sea turtles, are very different from land or river turtles．All sea turtles can swim through the water faster．Instead of feet for walking, sea turtles have flippers which are better for swimming．The flippers aren’t much good on land, however, and walking is hard for a sea turtle because they are usually big and heavy．

　　Another interesting thing about a sea turtle’s flippers is that they cannot be pulled into their shells．Land turtles can pull their feet into their shells for protection, but a sea turtle can’t．

奇怪的是，绿色的海龟并没有那么绿。 它肯定不像树那么绿。 事实上，它的壳几乎是黑色或棕色的。 最大的硬壳海龟有200到300磅重，一个壳有36到43英寸长。 但它的头比其他海龟小。  

小绿海龟只有两英寸长。 随着海龟长大，它的壳大部分保持黑色，而身体变成橙色或棕色。 小海龟喜欢生活在海里，尤其是在有很多海草的地方。  

绿海龟和所有的海龟一样，与陆地或河流中的海龟非常不同。 所有的海龟都能游得更快。 海龟的鳍状肢更适合游泳，而不是用来走路的脚。 然而，海龟的鳍状肢在陆地上不太好用，行走也很困难，因为它们通常又大又重。  

另一个关于海龟鳍的有趣的事情是，它们不能被拉进壳里。 陆龟可以把脚伸进壳里保护自己，但海龟不能。