There are several currencies in the Caribbean. Here are the currencies that you may use:
Aruban Florin (AWG): Aruba
Bahamian Dollar (BSD) (and US Dollars widely accepted): The Bahamas
Barbadian Dollar (BBD): Barbados
Belize Dollar (BZD): Belize
East Caribbean Dollar (XCD): Antigua and Barbuda, Saint Kitts and Nevis, Saint Lucia, Dominica, Grenada, Saint Vincent
Euro (EUR) (and US Dollars often accepted): Guadeloupe, Martinique, St Martin
Lempira (HNL): Honduras
Netherlands Antillean guilder (ANG): Curaçao
Trinidad and Tobago Dollar (TTD): Trinidad and Tobago
United States Dollar (USD): Bonaire, Turks and Caicos Islands, US Virgin Islands, Puerto Rico