Let the hive mind of Engadget get that for you.
"We need a digital camera that can be switched on and fire off that first shot fast. It's not a commonly tracked statistic on any review site, and nobody seems to have this information for every camera. We were hoping other readers could inform us as to what small digital cameras can fire off their first pics in under a second (ideally under half a second). It needs to be small, but mostly, just really quick in operation. Thanks!"
NASA is not running this robot "wet" under water but rather in the Aquarius under sea research station operated by the University of North Carolina near Key largo: http://www.uncw.edu/aquarius/index.html. NASA uses this unique facility as a proving ground for space flight
technologies because it forces real constraints and is relatively cheap.
Check out the Aquarius webcam page here: http://www.uncw.edu/aquarius/thumb_cam.htm