Lat
Long
Depth 18mtrs
Rating : Open Water Diver
This is a good no-current dive when the tides are still running inside the heads. It is also a great second dive after the subs or other deep wrecks. Castle rock is one large mushroom shaped Bommie in 18 meters requiring the whole dive to circumnavigate thoroughly. The top rises to 12 meters and is covered with kelp and ascidians while the sides are undercut and host most of the action. Castle rock is one of the best reef dives outside Port Phillip Heads.
Expect to see: Large black bull rays, Blue Devil fish, schooling boarfish, old wives, dusky morwong, weedy sea dragons and schooling banded silver sweep.