GT Rock (GT stand for giant trevally)is a divesite in the Triton Bay, Irian Jaya.
Diving is around a rock island.
The quality of the diving at this site can vary a lot depending on the current. If there is enough current the is plenty of big fish (including giant trevallys).
If there is no current the big fish is missing, but there is still a good chance to spot big rays or wobegong sharks and there is always some rare macro animals tobe spotted (e.g.hippocampus pontoi).