Turtles and turtles are legged four-legged animals belonging to the reptile. The so-called Testudinata (or Chelonians) animal species is distinctive and easily recognizable in the presence of a hard and rigid 'house' or shell (bony shell).
This turtle shell consists of two parts, the upper part that covers the back called the carapace and the bottom (ventral, the abdomen) is called the plastron. Then each part is composed of two layers. The outer layers are generally large and hard scales, and are arranged like tiles. While the inner layer of bone plates are arranged tightly like a shell.
Exceptions are in the group of labi-labi (Trionychoidea) and the type of leatherback turtle that is not scaly and replaced by a layer of skin on the outside of the bone shell.
In Indonesian, we recognize three groups of animals belonging to this nation, namely turtles (English: sea turtles), freshwater turtles, and tortoises. In English, it is distinguished between land tortoises and freshwater tortoises or terrapins.