A shimmering silver-blue cloud drifts just beyond the reef. It turns and flashes in the sun. This is the blue maomao, one of the most elegant cruisers in New Zealand waters. The body is deep and compressed. The head is small and pointed. The mouth holds fine, comb-like teeth. The colour is striking. Deep electric blue covers the back. It fades to a silvery belly. A distinctive yellow stripe runs along the sides. The fins are pale and translucent. The tail is deeply forked. These fish are nomads of the reef edge. They travel in large, fast-moving schools. They follow currents and the food that drifts with them. They feed on small crustaceans, plankton and tiny fish. Those fine teeth filter meals from the water. Divers often see them as a moving wall of silver and blue. They suspend in the mid-water. They turn as one. It looks like a single organism with a thousand bodies. The Māori name Maomao refers to this habit of schooling in large numbers. It was a known food fish. Nets and spears caught it in the clear blue water beyond the reef. Today it remains a favourite target for spearfishers. They value the firm, white, flaky flesh. The flavour is mild and sweet. To catch a blue maomao is to catch the silver flash itself. It is fast. It is beautiful. It is delicious. A shimmering gift from the current. You see them from the boat as a silver cloud in the distance. You point and say Maomao. Everyone nods. They start getting their gear ready. It keeps going.