Last night I got to take a really good look at the eel when I was siphoning and he's definitely an American/European Eel. Which one, I have not a clue though

Thanks for your help
Does anyone know of any resources for taking care of these guys in an aquarium? I can't find anything online except biologist's information, which is about them living in streams and the ocean...mine lives at my house
I got this guy at the LPS and it was sold as a Ropefish. I bought another a few weeks later, but he died. He was sold as a Spaghetti Eel. I knew it wasn't a spaghetti eel, as I've had those before and they were tiny and see-thru. n00b pet store people... :mad2