largest wrasse in New Zealand waters

Size
Length: 30–40 cm, Weight: 1–2 kg
Lifespan
10–15 years
Diet
Feeds on small crustaceans, worms, molluscs and sea urchins. Uses strong teeth to crush shells and pick at rocks. Lives in shallow rocky reefs of northern North Island.
Habitat
Shallow rocky reefs in warm clear water of northern North Island. Depth from low tide mark down to about 30 metres. The fish of the subtropical north. Colourful and tropical-looking.
Range
Northern North Island from Three Kings down to Bay of Plenty. Most common in shallow rocky reefs with warm clear water. Restricted to subtropical northern latitudes.
Endemism
Endemic
Main Threats
None significant. Species is common and widespread in northern range. Habitat loss from coastal development and pollution poses risk. Climate change affects water temperature patterns.
Population
Not Threatened. Common in warm clear waters of northern North Island. From Three Kings down to Bay of Plenty. Favourite of divers for stunning tropical colours. Population remains stable.
Conservation Status
Not Threatened
The northern reefs are colourful. This fish is why. It is the peacock of the northern reef. A large, chunky wrasse with a deep, compressed body. The head is blunt. The mouth holds strong canine teeth. The colour is spectacular. Males are brilliant electric blue and green. A bright orange-yellow stripe runs along their sides. A distinctive black spot marks the tail. Females are a more muted reddish-brown. It looks like it was painted by someone with too much paint and not enough restraint. Show-offs of the reef. Sandager's wrasse are curious and bold. They often approach divers. They check them out with those bright blue eyes. They feed on small crustaceans, worms, molluscs and sea urchins. Strong teeth crush shells and pick at rocks. They also change sex. All Sandager's wrasse are born female. The largest, most dominant individuals become male. A fish that can change its mind. The biology is flexible. The hierarchy determines the gender. It is a practical adaptation. Not highly prized as food fish. But a favourite of divers and underwater photographers. They come from all over the world to see the stunning colours. The flesh is too bony. Too small. Too pretty to eat. The value is visual, not culinary. The camera captures what the plate cannot. To see a Sandager's wrasse is to see the tropics in New Zealand waters. A flash of electric blue and orange in the clear northern sun. It is a reminder that New Zealand fish can be just as colourful as anything on the Great Barrier Reef. The fish of the northern diver. The one that makes a person gasp when it swims into view. A living jewel in the clear blue water. The comparison is inevitable. The latitude allows it. The current brings the warmth. The colour follows. The diver gasps. The wrasse tilts its head. It stares back. Then it swims away. Electric blue and orange. It disappears into the kelp. The interaction is brief. The impression lasts. The reef holds many such moments. This one is particularly vivid. The species thrives in this niche. It occupies the shallow rocky zones. It avoids the deeper, colder waters. The range is limited but distinct. Within that range, it is abundant. The visibility is high. The behaviour is bold. The result is iconic. Divers seek it out. Photographers frame it carefully. The subject cooperates. It has no fear. Or perhaps just curiosity. The distinction matters little. The image is captured. The memory is stored. The fish moves on. It does not know it is beautiful. It just is. And that seems to be enough.