Photo of Animalia: species: Cavernularia sp.

Cavernularia sp. protruding 12 to 15 cm above the sand surface, 23 metres depth off Coconut Beach, Lizard Island. Thanks to Joe Rowlett for the likely genus-level id.

© Anne Hoggett

Joe Rowlett notes (10 Jan 2020): "This is likely Cavernularia, as far as I can tell. it should lack a rachis."