other thoughts (was there first week this month)
-leave the floaties behind. You're planted on the sand, overweighted by a lot (I went from 12 to 39 lbs), with the current pushing you from behind as you hold position in the lineup. A floaty camera is just a sail in the wind. And should a shark grab it (my dome got bitten, but not taken), it's not going to hold it for long. I think you want it to sink immediately when it spits it out, so it can't go very far. A bouyant camera may drift to Newfoundland.
I shot both fisheyes and narrow zooms. Had enough close passes that I think the fisheye was more valuable. The conditions were often poor enough that the reach of a longer lens did little good.
Did some time without strobe, where the GH4 can fire fast. Flash exposure was definitely a challenge- esp with the hammerhead. If it's low, the black top and the sand behind give tough choices. If it then swims head height or higher on the next pass, you got the white underbelly and any manual settings from the prior pass are all wrong. The current and your need to turn around a lot with your 'armor' (the camera) have the arms moving a lot. I thought about going to single arms to deal with it, but then more potential for backscatter.
Bring the gopro and mount on top, just let it run when there's multiples in the water.
In all, felt like I missed a lot more shots than I made. I traveled light and didn't bring my laptop, so wasn't doing nightly reviews. That was a mistake.
Had a great time, in any event. 14 unique tigers over the 14 dives in the week, and 2 hammers. Maxed out at 6 at one time.