Double Cove Marine Reserve is a sheltered inner-sound dive in Queen Charlotte Sound where rocky shoreline, sand, and a gentle wall create an easy site for training, first dives, and relaxed local exploring. The draw is less about dramatic terrain and more about calm access, approachable depths, and unusually confiding fish life, especially the blue cod that often swim right up to divers and boats. It is a straightforward Marlborough Sounds reef dive that works well when you want protected water, simple logistics, and a chance to spend time observing temperate marine life at close range.