Like all anemones, Entacmaea reproduces both sexually and asexually. The Bubble Tip is the only purposely stocked Actinarian to regularly produce and release gametes in captivity. This generally occurs during April and May between 0700 and 0900 AM a few days after a full moon. Hobbyists have been fortunate enough to observe/record not only the wispy release of sperm, but also planulae, greenish spheroid particle-young given off through the tentacles of females (Entacmaea appears to be dioecious, from the Greek meaning "two houses"... i.e. separately sexed). Females are known to also supply the initial zooxanthellae to their planulae offspring, thus helping to ensure their survival post settling.
Should your specimen/s release sperm into your closed system, you are advised to execute a large water change, clean your skimmer thoroughly (including the contact chamber) and utilized chemical filtration, to reduce the likelihood of fouling from this biomass. Continue water testing, mixing and storing of new water... and if need be, move all livestock to other established quarters.
(from wetwebmedia.com)
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