What happens when a water bear gets too dry? The water bear dries out. It forms a little ball. The dried-out ball is called a tun. It is not active.
A tun does not eat or move. But it is still alive. If water is added, a water bear becomes active! It can eat and move again.
What Do You Think? Why do you think these animals are called water bears?
Photo Credit: McGraw Hill Education
