Quote;
"here's also an anemone which looks like it's missing all of its tentacles from the inside portion. There's often a circle in the middle of
the anemone where the tentacles never grow. The tentacles grow on the outside portion of the anemone. This anemone is known as the Rock Anemone. It's a very interesting anemone because you see what is in the center. Usually you cannot see what is inside of the anemone. "
That is what led me to the rock flower ID. I think with Majano you can see some of the oral disk, but it has tentacles moving in from the perimeter more than the one the OP pictured. JMO
Maybe a closer picture would help.