
Black Cup Coral - Tubastraea micrantha
Usually during day time, the Polyps of this Black Cup Coral is not exposed/seen, in this instance, you will only see the branching skeletons. When they are feeding, usually at night or late afternoon, then the polyps opens up.

The species Tubastraea micrantha is also known as Sun Coral or Sun Polyps, is a genus of coral in the phylum Cnidaria. It is a Cup Coral in the family Dendrophylliidae.
Similar species: Stony Corals
By Albert Kang
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Uploaded Dec 6, 2016. Captured Mar 28, 2016 17:02 in Mabini Circumferential Rd, Mabini, Batangas, Philippines.