Wrasse hiding?

[kenman999]

I have had a sea grass wrasse for 3 months. However for the past week, without any addition of new fish. He decided to hide during night time and come out early morning for a few hours then as soon as my lights go on, he will go back to his hiding spot under the sand again.

Is this normal?

Before the lights turn on, he eats quite a lot. But it's quite annoying not being to see him while the lights are on.

Any help would be appreciated. Thank you