Really like what you have done! In the Spanish Virgin Islands logo you are using the seahourse, the starfish and a palm tree, these graphics need to be tied in strongly to the brand we are trying to position as bohemian, chic, retro, modern and spanish - versus simply generic Caribbean icons. Culebra and Vieques have different personalities under the same style of the Spanish Virgin Islands and this logo should start to define that overall identity while still trying to set it apart from other Caribbean countries/islands. As you develop further, really try to incorporate all 3 logos into a single scheme, they are a family!
I have posted a couple image boards for each island that will hopefully help you develop the deeper.
Also, could you include the words Culebra and Veiques in this logo please?!
Thank you for your awesome designs!