Caribbean Reef Shark: This is the most commonly seen shark in the Caribbean. It is usually 6.5-8 feet, or 2-2.5 meters, long. Look for dusky-colored fins that do not have any prominent markings, as well as a coloration that is dark grey or grey-brown on the top of the body and white or white-yellow underneath.iger Sharks: Another large shark, capable of growing to a length of over 16 feet, or 5 meters, the Tiger Shark can be found in the Caribbean and other warm waters around the world.