Well Diving needs is a lot luck, but something special like the Snapper Spawn helps a lot. Brian had said sightings can happen up to 12 days after full moon and are then often for the whole dive then as they're hungry due to less spawn, so I was interested to see where you were in terms of the full moon. Last year having just seen a 35footer glide past I managed to be looking the wrong way as a Great Hammerhead appeared that everyone else saw, and we then we got to play with a pod of Dolphins on the surface at the end - that's a dive that will be tough to beat!!