A wide reef channel between Peleliu and the southern Rock Islands, famous as a manta cleaning station. From November to May the mantas are present in numbers, hovering motionless over coral bommies while small wrasses pick parasites from their gills and bellies. Grey reef sharks and bumphead parrotfish are reliable supporting cast.
Most Koror dive operators run a two- or three-tank day to German Channel and the surrounding sites. Easy to moderate diving; suitable for less experienced divers in calm conditions.