It is tidal, but about six hours behind the ocean flow due to filtration through the rocks. There is a deep layer of sediments on the bottom which is anoxic or anaerobic. Gambasien or minnow are the only fish in the pond. They help control mosquito population by feeding on the larvae and have been introduced to all ponds in 1940s. The Great Blue Heron feeds on this fish.
Eels are also present .
The pond is a bird sanctuary and provides an ideal habitat for both resident and migratory birds. It is also the largest bird sanctuary on the island. This unusual and important tree tolerates its roots being submerged and is also able to live in salt and brackish waters. A sluice gate was built in 1985 to control the level of the pond and to help flush the pond with new oxygen-containing water to control eutrophication and the increase in nutrients which can lead the algal blooms. Salinity levels fluctuate because heavy rains dilute the salt, while storms bring new seawater in.