The only thing you need to do is to GENTLY brush your tongue daily, as bacteria can collect in the fissures, causing bad breath. I'm enclosing a link to the couple of lines wikipedia has about it, mainly so you can see the picture there.
Quick Answer. As of 2009, there are 270 species of turtles, and more are being discovered. Turtles have been on the Earth for 230 million years and predate dinosaurs. Turtles have developed multiple habitats and live anywhere except the Arctic and Antarctic. Continue Reading.
There are two groups of sea turtles: Dermochelyidae, including the Leatherback, are the most ancient sea turtles, the largest, and the only sea turtles without a hard shell; Cheloniidae, including the other six types of sea turtle, vary in size but all have a hard shell.