Then my fire eel must have a mood problem. He is 15" right now, I have had him for about six months.
He will only eat live earth worms and will only eat them out of my hand but some days he lays into me.
I dont know if anyone else here has experienced a full force bit from a fire eel but it really shakes you up when "Such a docile and shy fish" does that to you. They have amazing bit force, just as well their are no teeth.
He normally does it to me when I am cleaning one of the internal filters and sneaks up to my hand behind the filter where I cant see and lets me have it

then some days he with let me stroke him while he is swimming around and even swims through my fingers.
BUT.............I wouldnt part with him for anything, it has to be one of the most interesting fish I have ever kept and keeps me interested every day. This fish seriously has a personality.