Old-school East End divers may know this site as Parrot Fish Caves, but it underwent a name change when a Houston-based dive shop sponsored the new mooring ball. The site's distinguishing feature is a large cavern that is extremely wide yet low, creating a letterbox effect. The most authentic way to approach it is through a hole in the top of the ridge, which leads under a distinctive arch and pops you out at the cavern entrance — pass slowly through the letterbox and focus on the dark recesses for all manner of fascinating marine life.

True to its earlier name, this is a great site for Parrotfish. The larger examples include the Midnight Parrotfish and the spectacular Rainbow Parrotfish — you can often hear them before you see them, with a grinding, crunching sound as they bite through rock with their powerful beaks. Afternoon dives offer the opportunity to witness smaller species spawning in large schools, as pairs break away and shoot upward before diving back down again — a fascinating and rarely witnessed behavior.