I ran across an organism very much like this one in Indonesia back before iNaturalist:
Asking locals folks got me the info that it was maybe a pelagic tunicate or pelagic squid eggs. When I saw the observation here, I got excited because I thought the mystery would finally be resolved. But looking thru iNat, I found nearly identical photos ID’d as one or the other.
How do you tell them apart? Is it POSSIBLE to tell them apart without a microscope? Neither my photo nor the ones in iNat seem to have enough resolution to see what the red dots are.
Inquiring minds want to know. I still hope to see another one snorkeling or diving some day.