oh found another...
http://animal-world.com/encyclo/mari...e.php#Lionfish
"Lionfish:
The Shortfin Lionfish is the most often reported as having bred in captivity.
They are haremic, which means one male will spawn with a group of females. After courting for an entire day, the fish will spawn around midnight. They will rise to the top of the water column during and release gelatinous balls of eggs, each ball containing about 2000 eggs.
The egg balls will dissolve after about 24 hours releasing the individual eggs. The eggs themselves will hatch after about 36 hours. The fry will immediately feed on the available plankton. As with most fish it is difficult to keep enough plankton in the water to keep the fry alive.
The above information was obtained from Seascope, Volume 15, Summer 1998, in an article by Matthew L. Wittenrich entitled Lionfish: An Overview"