We developed an ultrahigh-sensitivity HDTV camera for a remotely operated deep-sea vehicle using New-Super-HARP image pickup tubes and a special optical system. This was mounted on the 3000-m-class remotely operated "HYPER-DOLPHIN" and it captured extremely clear images that were displayed in the control room (control van) of the mother ship. The display used in this system was a 42-inch high-definition plasma screen. The camera was used to record the deep-sea marine environment and its inhabitants at depths up to 3000 meters, which has never been done with conventional systems.