Orange cup coral - Tubastraea coccinea

I think this is T. coccinea based on the lack of separation of the polyps at the base, feature that distinguishes it from T. faulkneri (but just as with all other corals ID at the sp. level is always tentative!).
https://reefbuilders.com/2012/10/18/tubastraea-faulkneri-coccinea/

The Orange cup coral

Orange cup coral belongs to a group of corals known as large-polyp stony corals. This non-reef building coral extends beautiful translucent tentacles at night, which gives the species its nickname, the sun coral. "Tubastraea coccinea" is heterotrophic and does not contain zooxanthellae in its tissues as most corals do.

Info 2 0

Similar species: Stony Corals

Species identified by Patomarazul