im guessing your talking about a goldentail moray.they come in two forms the regular ones(dark with yellow spots) and the reversed(yellow with dark spots).they get around 30"+ and can be quite aggressive.as a matter of fact mine ate my porcupine puffer about a month ago.but its a very cool eel,i would suggest atleast a 120 gallon with plenty of places for him hide and feel safe.mine is in with a fuzzy dwarf lion,a pinktail trigger,a jeweled eel,and a chainlink eel.soon to be moved into a 500 gallon tank i just bought.
no small fish,crustaceans they will be food.