I don't have any cypastraea i have some hammer frogspawn kenya tree a green and a purple some zoa and paly a stylophora birdnest forest fire digitata a montipora digitata a golden rod anacropora a pavona fuzzy some ricordea and a chalice coral i have start that tank almost 2 years ago with dry rock and dry sand
That is a survivor. Appears there was a frag glued there (last year?) that "died" but has now resurrected (Halalulah, It has risen!), but something is growing there and looks fairly happy.