Moki are about during the day, I see them often while diving. They are much more common in the evenings, never dived at night but I suspect they are more common.
Fished in Moetapu bay, arrived at 5pm and fished until 8pm. Fished the incoming to high tide. Quite a few nibbles and strikes around dusk, but only caught a small Kahawai. After dark the nibbles stopped but a second kahawai got hooked on a popper fly around 7:30pm. Pleasant calm evening.
Nothing to suggest that Snapper were about.