Coral Spawning schedule
www.researchstationcarmabi.org/images/stories/file/CORAL%20SPAWNING%20PREDICTIONS%20SOUTHERN%20CARIBB EAN%202010.pdf

A= first spawning (Sept) September 23 to October 2
and
B= second spawning (Oct) October 23 to November 1


Looking at Carsten's post
visibility may not be that great for this month, but maybe worth a chance