Puerto Rico is a Caribbean island. It lies roughly 1000 miles of the nearest coast of Florida. It should be noted, that Puerto Rican civilians do not have the same rights as other USA citizens.
Never-the-less, from a wildlife point of view, not being on the USA mainland means that there are a range of wildlife which you would not encounter elsewhere in the USA. This includes animals like toucans and parrots, and even Boa Constrictors (while these have become pests in Florida in recent decades, they are native to Puerto Rico.