This lovely little yellow coral (Heteropsammia cochlea) lives on a small deserted shell remodeled and occupied by a sipunculid worm (Aspidosiphon corallocola). The worm now moves the coral over the sandy bottom as it feeds preventing the coral from becoming buried. Puri Jati is home to a large colony of these corals and worms. This one was 26mm (1 inch) across.
16 October 2017