There are a few poisonous critters to look out for too. There's the fortesque, a fish with poisonous spines on its back that will essentially kill the flesh the poison gets to, the rockfish, a fish that looks like a rock, with a poisonous bite that is essentially lethal, and, my personal favorite, the blue ringed octopus. It's venom is a neurotoxin that will paralyze you (dangerous in water,) cause respiratory arrest and then cardiac arrest. There is no antidote, yet, so they're dangerous little things. We spotted one hiding in a hole under an anemone this morning, and the group has seen about six at this point. One group actually caught one, and we have it in a tank in the wet lab (pictures soon!) They're small, about the size of a golf ball, smart and generally stay away from humans, but if you step on them they'll bite, so that's the danger. They're sandy colored, but flash the blue rings when you irritate them.
There are sharks out here, but they mostly stick to the deeper channels, although we may have spotted a Wobbegong (carpet shark) by the dropoff this morning. We have a wobbegong in a tank in the wet lab, they're cool animals, not very dangerous.
We're hoping to get some snorkeling in after lunch today, and there's a shark lecture later this afternoon as well.