Can you guess what these fossils are?

One of the challenges that comes along with collecting fossils is figuring out what they all are! This is usually done by experts who know a lot about certain types of fossil animals, but a few fossils are trickier than others, and sometimes even the experts get stumped! Can you figure out what type of animal each of these fossils represents? When you think you know the answer, click on the photo to see the answer in the caption!