There are folks collaborating on identifying Needs ID and Unkowns on this thread. I posted a link to this thread there.
Something similar had to be done with several thousand observations of a newly identified parasitic fungus species that was previously lumped in a species complex. In that case the obligate host species was easy to ID so I was able to help with that, in spite of knowing little about fungi.
I’d be willing to give corals a try but I’ll need that pdf and probably some coaching.