A recent paper in Scientific Reports (LINK to .pdf) examines the timing and cause of a major extinction event in the Caribbean. From the looks of the evidence presented in this paper, humans might be the culprit, not rising seas. Some of the samples used in this study were collected right on Abaco!
This U. Florida brief does a decent job of summarizing the research: UF Press Release
For information on extant bats of The Bahamas check out this pamphlet: Bats are cool!