Agree with what Dan V says. I too have stayed at Ha'atafu surf camp, several years ago. Some very fishy offshore bomboras with big waves, currents and heaps of fish just off the main access. I am not a spearo but went out trolling with the locals and got yellow fin. Local fishermen for the camp go out every morning. Agree that it is very sharky. Very clear and warm water. You can access the reef at different locations on the mainland also, very deep drop off close to the barrier reef. The resort is at the very north western part of Tongatapu.