Honestly, they like a cave rock, by means it has holes in it or threw it, they like hidding at the bottom of the rocks or in them and come out to eat.
But I couldn't say much because my Friends EEL committed suicide just yesterday..
It jumped out of the tank.
His' cover is a little broken, but im still not sure how, out of the entire cover there is prob a hole about 2 inches big, did it jump around all night till it found the hole, what a committed Snowflake EEL, lol, committed alright, suicide that is.
You guys never try that ok....
your life is far to special and important,
you are here for a reason..
Ohh well, he told me he woke up, and saw it on the floor. ahahah lol
peace