MT, there are similar formations (sandbanks ) between the Southwest tip of Exuma (Sandy Cay area) and Long Island which get exposed at low tide. This is prime permit country with a healthy helping of Barracuda and large jacks. Sandy Cay once had a great head of bonefish too until lobster fishermen from another island came in and netted the schools out for bait.
Let us know how you get on on Eluthera!
When sight fishing, look over your shoulder from time to time, you never know who's behind you