As good as the marine reserve is, it used to be better, writes Clarke Gayford.
There were different types of medieval knights, one group was of rich aristocratic heritage who entered the realm via birthright.
Others were honest, blue-collar knights who fought their way up through the ranks. Some, in post-service hardship, were rewarded with a military pension: they became known as The Poor Knights.
The Poor Knights Islands therefore are thought to be named as an homage to working-class veterans, bestowed by a visiting captain splashing names about as he did his coastline cartography. In situ it's a scraggly collection of weather-gnarled pillars, remnants of a 10 million-year-old volcanic cone standing 23km offshore from the Tutukākā coast. Today it's a marine sanctuary life raft that was considered by famed French explorer Jacques Cousteau as one of his top 10 dive sites in the world. Although if you ask our own famed marine biologist, Wade Doak, who was out studying the islands when Cousteau came to visit: "It was a shame he didn't come on a good day - he may have ranked it higher." Having spent more time out there than most, Doak understands how good it can get.
It's hard to know where to begin explaining the diversity of life found here both above and below the water. The rock structure alone is a geologist's dream, it has sea tunnels so large on several islands you can drive a boat right through. It also has the world's largest sea cave by volume; it can house three large dive boats. Dive below and a lifetime of discoveries exist in just the sea sponges, soft corals and vibrant collection of marine plants that cling to the rock walls. The fish life here is extraordinary, with the islands far enough offshore to exist in an eastern current line not present on the coast. This brings in life not seen on the mainland, including tropical fish visitors. Tropical blue water flows in during the summer months providing up to 30m of visibility.