Refers to the areas where you have underwater cliffs or walls. Or it could be located far from shore and in the "Bluewater", sits a coral formation which as a diver you drop down onto, to explore. These areas tend to have currents which means that you normally have large fans jutting out or corals that sway in the current picking up nutrients. Not only do corals like the locations Large Pelagic Fish will be common in these areas coming up from the depths.
Drift dive or cruise the walls looking for pelagic fish, search today!