No. A plate is as soft below as above. It may feel like a hard disk now, but when it blossoms out it is soft as bubble coral and would rip itself to ribbons on rock. They are capable of propelling themselves on the sandbed if unhappy. Put it on the sandbed under full light, in good but not violent flow, and drop bits of food onto its disk occasionally. It will like bits of shrimp. It can clear its own surface of gravel and unwanted debris. It eats almost anything.