is the trip worth it?i've heard its mostly neat scenery-stalagtites etc afew people talk about some bull and hammerhead sharks how often are these sitings,in 30 or so dives ive only seen sharks other than nurse sharks one time and they were cruising 40 feet below us,although the barracuda are neat one swam the whole dive about 12 inches from my wifes ear of course we didn't tell her till after the dive,they look mean but never have had them bother me even in the florida keys where its not unusual to come up in the middle of a school of 2-300 of those sharp tooth friends