That is crazy,chalices,Echinophyllia S.P,Echinopora S.P and Oxypora and Mycediums get tossed in a lot on the common name "chalice".These are honestly some of the ONLY corals that we deal with that can win a fight with a Acanthastrea Echinata or A. Subechintas ! Euphyllias (frogspawns,hammers,torches,anchors and so on) are one of the other species that can sometimes pick and win a fight with A Echinata ! The Acrospheres on the tips of sweeper tentacles of Euphyllias pack a POTENT PUNCH !! They contain some serious stinging power !!
That A. Echinata has had a few victims in its day if I recall correctly ! Cool post !!