I don't find it fascinating. I find it annoying, much like relatives who come to visit and stay too long. They are Parasites. Everything in the world that is alive has some other alive thing that has figured out how to suck the life out of it and thus doesn't have to work to live. This pertains to governments, too.
I used to work in a pet store and often had my hands in fishwater for various reasons. Sometimes we'd have a sizeable fish that would have a fluke sticking out of it and we'd pull it out and get some tweezers and yank it out, then put hydrogen peroxide on the wound, then dump the fish back in the tank with some methyline blue and malachite green or some such substances. Rarely did we lose a fish that we treated.
I've never seen internal flukes though. I think mine was actually attached to my liver. Kinda crazy, but the first cup of Celestial Seasonings De-tox AM tea caused my liver to 'twitch' for about 20 minutes. I didn't know what to make of it then, but now I think that I made my ugly little friend unhappy with the drink. Then I killed him with the Para-Rid and Para-Gone. Then his dead body just stayed there for a few weeks, ignored by colon cleanses, until I did another liver/gallbladder flush. That's when he came out, intact but dead. And dehydrated-looking. I left him in water for half a day and he got all fluffy and fluke-like looking again. Probably should have taken pictures of him before and after.
Anyway, I'd find it hard to believe that a centipede type creature could live inside a person, though I think I've seen some ocean critter that looked like a centipede. This was too gelatinous to be related, I think. The 'legs' were long, but not longer than the 1" bodies.
I'm off to ingest some meat and potatoes, and probably a bunch more parasites.