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.
Most sea turtles, especially the males, almost never leave the ocean, which makes it more difficult to keep track of their population and ages. The largest and oldest known sea turtle species is the leatherback turtle, which is believed to have existed for more than 150 million years. Leatherback turtles also have a longer lifespan compared to other turtles and can live up to 100 years.