What is the difference between a tortoise and a turtle? All tortoises are in fact turtles—that is, they belong to the order Testudines or Chelonia, reptiles having bodies encased in a bony shell—but not all turtles are tortoises. The two have habitual and physical differences: that is, they look and act pretty differently.
Tortoises only live on land, whereas turtles live in, or in association with, water. Turtles also have webbed feet and flipper-like forelimbs for easy swimming, while tortoises have stumpy non-webbed feet for walking on land. Their carapace (the bony shell on their back) also differs between species. Turtles have smooth and flatter carapaces to glide effectively in water, while tortoises have bumpier and more rounded carapaces. Another big difference between the two is their diet: tortoises are generally herbivorous, while turtles are omnivorous.