No, not like nitro they use in cars. In nitrox diving, you use air with added oxygen. Normal air is 21% oxygen, today I dove with 32% oxygen. But getting more oxygen is not actually the point. Rather, the goal is to have less nitrogen. You can't go as deep with more oxygen in the air, since you can otherwise get oxygen poisoning. Completely irrelevant in my case, since even at 32% oxygen I can still safely dive to 30 meters which is all I can do anyway. So the point of having less nitrogen is that you can stay down longer at any particular depth without getting the bends.
Also rented a camera today and tried to take some pictures. This is really, really hard underwater. First of, you have much less light so you longer shutter times, meaning you have to hold still to get a good shot. Second, you're floating in water which is moving, with nothing to hold on to. Which makes holding still, well, challenging. I did get a couple of cool shots (and yes, eventually I will post some).
Saw a morray eel on this dive. Bloody long fellow, certainly over a meter.
Also caught a glimpse of dolphins on the way back (from the boat). If dolphins are sighted, everybody is paying attention to that. They even turned around and tried to get closer, and everybody was happy to have seen them at all. Really neat, how people just seem to love dolphins sooo much, even though they can see all the other massive amount of cool life down below.
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