That is actually the "foot" of the trematode. The picture of the whole trematode didn't turn out as well. I couldn't fit the whole trematode in frame under that magnification (400x). The hooks are the most interesting part anyway. It uses the hooks to anchor onto the skin/scales. The head is on the other end. Still pretty creepy though. Hopefully, I will get some of those stained and mounted on slides so I can take better pictures (and clearer pictures).
Here is a picture of the whole parasite at 250x. It is kinda hard to see. The big black circles are air bubbles, and the trematode is curled around the bottom half of the left air bubble.
I found this parasite when I did a wet mount of a skin scraping.
Dawn