Bang , you thinking about breeding morays ? Below is about the best i could find in a short period of browsing the search engines. If you were really interested you might consider talking to a marine biologist or two. I do not know if there is going to be alot of info online about the subject. But i guess thats what colleges are for
Moray Eels
Everything we have found on the breeding moray eels indicates that they are not commonly bred in captivity for several reasons. First they will not breed until they are very large and have outgrown most aquariums. Also, morays, with the exception of ribbon eels, are what is called 'gonochoristic'. The female will spawn either as a pair or with several smaller males. At dusk the eggs are released and are basically pelagic. The larval stage of the eel lasts for 6-10 months and so makes it difficult to reproduce in the aquarium.
There are several species of freshwater eels, of the family Anguillidae, that spawn far out in the ocean and release up to 20 million eggs per female. After spawning though, the adults die. The young, called "leptocephali" then travel back to the continental shores where they metamorphose into small eels called 'elvers' that then move into freshwater habitats.