If you had posted that last pic with the first ones, the undulation of the oral disc along with it being in the sand would have suggested H. crispa. The rock looks devoid of coralline algae, is that a new tank? Anemones, especially bleached/comprimised ones, do not need to go in a tank that is not already very well established. Tell us that tank has been set up for several months and the nitrogen cycle is well established, please.