I say zigzag, just because often times peacock spiny eels (not true eels, by the way) are difficult to feed, like I said, mine only take live food (red wrigglers, ghost shrimp, chopped nightcrawlers), while the zigzags (finally got the latin name, here you go Mastacembelus pancalus, just watch out, tire track eels are sometimes sold as zigzag eels, but get to 36") usually take anything offered to them, sometimes even dry food.