Huh, I have a green wolf eel, I thought that the fact that it had fins was wierd. Honestly I have had SW tanks for around ten years now, and the green wolf eel has been the most awsome "eel" that I have had, It looks awsome, and it hunts live food just like any other agressive fish I have.....I have had it for about two years now and he is only around ten inches long but very thick. I would definatly recommend it for your tank.