eels will ONLY bite you if u have food in your hand e.g. when i was feeding a prawn once i got bitten. As already said this doesnt hurt at all it just makes you jump lol.
Also the spines are not even spiney lol i know that it sounds funny but they dont even prik you or anything. The only thing that i would watch out for if you must try and get him out is that he will not move and then wen you are bout 1 cm away from him he will move very sudden and u should try not to let him make you jump.
Finally i strongly adavise against trying to get him out!
This will only make him more stressed than he already is and wont help the situation after all he wil probably only go bak into it once our arm is out of the tank.