Wretched Beasties!

          This is a small paramecium. It's a protist, a single-celled organism. "Single-celled" means that a paramecium has only one cell for its entire body. Since they are small, they quickly slide easily around. It may be difficult to see, however Paramecium have tiny hair-like things, called cilia, that are used to put food into their tiny mouths and are all around the outside of their cell. In interesting fact, is that Paramecium are eaten by other protists or animals that eat plankton,  such as water fleas and mussels. 

          This is a tubifex worm. Tubifex worms are multicellular organisms. To eat, it buries its back part and then eats bacteria and tiny solid bits. An interesting fact, is that tubifex worms are food for fish and some fishers use them as bate. They can survive with very little oxygen, and they usually live in very polluted water. There are actually many types of species of tubifex worms.