There are several types of turtles, including freshwater, terrestrial, and marine turtles. Freshwater turtles are found in rivers, lakes, and swamps, while terrestrial turtles live on land. Marine turtles are found in oceans and seas and are well-adapted to life in saltwater environments. Some of the most common species of turtles include the box turtle, the red-eared slider, the painted turtle, the green sea turtle, and the loggerhead sea turtle.