Orange cup coral

Tubastraea coccinea

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.
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/ Fall,Geotagged,Indonesia,Orange cup coral,Tubastraea coccinea

Habitat

"Tubastraea coccinea" inhabits shaded vertical surfaces and caverns down to huge depths. Orange-cup-corals are also found in very cold water throughout the world. Orange-cup corals often dominate tropical habitats not occupied by other coral species, such as wrecks and cryptic reef habitats. They also colonize artificial structures, but experiments have demonstrated similar preferences for granite, cement, steel and tile. In Brazil, they are most abundant in the shallow sub-tidal zone at shallow depths between 0m and 3m.

References:

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Taxonomy
KingdomAnimalia
DivisionCnidaria
ClassAnthozoa
OrderScleractinia
FamilyDendrophylliidae
GenusTubastraea
SpeciesT. coccinea
Photographed in
Indonesia
Philippines