No fishing advice for GTMO but it brought back memories. In the early 80's the carrier I was on stopped in GTMO for a few days prior to BECCE drills and I remember getting off the liberty boats at the pier and looking down seeing 4-5' tarpon rolling around under the pier. Sure wished I could have tried for one! But the guys there told me they almost never bit anything they presented to them. Apparently back then there was so much food readily available to them. Good luck tho!
2006 Blue Wave 220 VBay