Turtles have been on earth longer than crocodiles. The underlying structure of a turtle shell is bone. Some turtles can live to be over 100 years old. Some turtles hibernate. Most turtles have 4 toes on each limb.
Turtles can have roundworms.
All turtles are vegetarians. Turtles are warm-blooded. Ear infections are common in turtles. There is no longer a risk of getting Salmonella from turtles. Turtles can get gout.