"Proper Fen eels, I expect"
Jellied eels...tasty looking, no?
Creative Commons Attribution Share AlikeJellied eels...tasty looking, no? - Credit: JanesDaddy

European eels (Anguilla anguilla) are freshwater eels, often eaten as jellied eels or glass eels.

For the more adventurous chefs amongst you, a recipe for fried eels can be found here. Go on, I dare you. 

 

European eel
Creative Commons Attribution Share AlikeEuropean eel - Credit: Ron Offermans