There doesn't seem to be an official pronunciation of the word, its sorta like a tomato potato kinda thing however I've only ever heard 2 pronunciations ( ca-ribb-ean and cah-ra-be-un) I'm from the...
You can go to coral world, swim with sharks, take a cruise, SCUBA dive, what else. If you took a Disney cruise, you can go to castaway cay, the best island ever