Mine hides most of the time, but when it is feeding time, he comes out from wherever he is once he smells the food in the water. He does move around at night and is a great scavenger in my tank.
About once every two weeks, I'll put a piece of shrimp on the end of a feeding prong for him to take, but other than that, he catches the pellet or mysis that falls to the sand bed. he seems to be well fed and happy.