Bobtail squid, Euprymna berryi, and surface reflection, 2012. Photo by Todd Bretl
What gear do you typically use? (cameras, lenses, housing etc)
I typically use Nikon's latest crop camera. Right now the D7100. DX is in my opinion a much better overall format for underwater photography. DX works better behind a dome port, and allows you to use a smaller dome which is nice for getting closer to animals and for travel. DX also makes macro and 'super' macro much easier. I typically use Nikon's 105mm with and without TCs and the 60mm for macro. For WA I generally use Tokina's 10-17mm fish eye. The zoom is handy since you can't swap lenses underwater and the 6" minimum focus distance is fantastic – it's important to get as close as possible to your subject underwater.