Star Polyp - Briareum violaceum
More details here:
http://museum.wa.gov.au/online-collections/names/briareum-violacea
''Briareum violaceum'', commonly called star polyp, is a species of a soft coral in the family ''Briareidae''.
Similar species: Soft Corals
By Patomarazul
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Uploaded Jul 28, 2020. Captured Nov 1, 2019 02:19 in Indonesia.