The waters around the Poor Knights have been described as ''dive heaven''.
The islands and surrounding waters have worn the ''marine reserve'' title since 1981 but have only been fully protected since 1998. That year, the Poor Knights Islands Marine Reserve status was bolstered to include a total fishing ban.
Experienced and novice divers from all over the world are drawn to the Knights' famed underwater scenery - its cathedral-type arches, caves, cliff faces, sponge gardens and kelp forests, clear water, and the sea life.
Above water, the predator-free islands are a unique environment, rich with birdlife and some endemic wildlife and plants. Only people with special permits, such as scientists and Department of Conservation (DoC) staff, are allowed to set foot on the rugged, cliff-fringed islands.