Exactly, Deepin’ peat hits the point. There are no eggs, but cysts, and the cystshells are not dangerous for Paros even if occasionally swallowed (that maybe different with other fish). They are contrary to beautiful for us, insofar we try to avoid it.
The nutritional value of Artemia naupliae vanishes rather rapidly after hatching. It is best immediately after hatching, and nearly to nothing after three days without being fed. This does not mean that “old naupliae” should not be fed to the fishes, but we should be conscious of that. We can bring female licorice gouramies to fertility with fresh Artemia but not with unboostered old naupliae.