release of eggs or planula larvae usually occurs at night and is sometimes in phase with the lunar cycle; for example, the pan-Pacific coral Pocillopora damicornis releases brooded planulae on a lunar cycle monthly, throughout the year, on the reefs of Micronesia and Hawaii;
p.178; in ....
Richmond R.H.; 1997; Reproduction and Recruitment in Corals: Critical Links in the Persistence of Reefs; in Birkeland C. (ed.); Life and Death of Coral Reefs; Chapman and Hall London - UK;