During September 1993, after the St Lucia estuary had been closed to t
he sea for about nine months, two samples of live plankton were collec
ted at the mouth inside the closed estuary. Fish eggs from these sampl
es were hatched and identified by the characteristics of the eggs and
early larvae. Pomadasys commersonnii and Crenidens crenidens were rear
ed to confirm identification. Eggs of nine species were found and all
but one were identified to at least genus level. The unidentified egg
was probably that of a clupeiform, and the most common egg was the spo
tted grunter Pomadasys commersonnii. Subsequent sampling in the Charte
rs Creek area in 1994 confined that five of the species also spawn in
the main lake, while a further species was added to the list of marine
fishes that will spawn in St Lucia given favourable conditions.