This is a freshwater flatworm called a planarian! Yes, those little googly eye-looking markings actually are their eyes. Somebody cut this little worm up, but don't feel bad for them! Flatworms don't have much in the way of vital organs, so being chunked isn't a big deal for them. Since each chunk can become a new little worm, planarians will even splice themselves apart to reproduce in nature, a process known as binary fission!

(However, earthworms are not flatworms, and will just die if you cut them into pieces. So, please don't!)