Weird behavior from plate coral

[nick654377]

We got a plate coral about 2 months ago and he has and still is always inflated. Takes jumbo mysis twice a week or when I remember to feed him. Always happy and I know they move where they want to go.
My question is every morning he burrows into the sand bed and is make my quite a deep hole. Is this normal for a plate coral to do?

 

[SlugSnorter]

We got a plate coral about 2 months ago and he has and still is always inflated. Takes jumbo mysis twice a week or when I remember to feed him. Always happy and I know they move where they want to go.
My question is every morning he burrows into the sand bed and is make my quite a deep hole. Is this normal for a plate coral to do?

Pretty sure its just anchoring itself into the sandbed