This fourth installment in the hilarious and highly illustrated full-color Superpower Field Guide series features Olenka, an ordinary eel. Olenka may be slimy, wiggly, and the color of mud, but never, ever underestimate an eel. Meet Olenka, an ordinary eel. Did I hear you say, "But aren't eels just long slippery slimy fishy-things that .