buries itself in the bay sand by day

Size
Length: 30–45 cm, Weight: 0.5–1.5 kg
Lifespan
10–15 years
Diet
Feeds on small fish and crustaceans. Delivers electric shock to stun passing prey. Hunts motionless. Uses worm-like lure in mouth to attract curious fish in sandy habitats.
Habitat
Inhabits sandy and muddy bottoms in shallow coastal waters from 5 to 100 metres depth. Burrows completely into sediment during day with only eyes and mouth exposed. Emerges at night to hunt.
Range
Found in coastal waters of North and South Islands from Northland to Otago. Most common in sandy bays of North Island. Also found in southern Australia and Southwest Pacific region.
Endemism
Endemic
Main Threats
Bycatch in bottom trawl and set net fisheries. Habitat disturbance from dredging and coastal development. No targeted fishery. Climate change affects larval survival in nursery areas.
Population
Population trends poorly understood due to burrowing behaviour and nocturnal activity. Not targeted commercially but caught occasionally as bycatch. Electric shock can startle fishers.
Conservation Status
Not Threatened
Human Risk
venomous
Handling Note
buries in sand, venomous spines cause intense pain easy to stand on
Conservation Note
Endemic marine fish; not assessed in freshwater report but widely distributed and common in coastal waters.
Assessment
NZTCS Freshwater Fishes (2023)
Te Ao Māori
In Māori tradition, Kourepoua was a fish of the sandy bays and harbours. Its burrowing behaviour was well known to Māori fishers. They sometimes found it by stepping on its buried form. The electric shock was a surprise to anyone who handled it carelessly. The name reflects its habit of digging into the sand. This practical knowledge highlights the observational skills of early inhabitants. They noted behavioural parallels between land and sea creatures. The name persists as a descriptor of its primary survival strategy.
It buries itself in the sand. Only its eyes show. Then it waits. That is the whole strategy. Genyagnus monopterygius is the electric ambush predator of the sandy seafloor. It buries completely with only its eyes staring skyward. It waits for unsuspecting prey. The upturned mouth gives it a permanent look of surprise. But the stargazer is not surprised. It is waiting. It has been waiting for hours. It will wait for hours more. Patience is the primary weapon. Stillness is the shield. A specialised organ behind its head delivers a powerful electric shock. This stuns anything that swims too close. The organ is derived from modified muscle tissue. It is the same adaptation found in electric eels and electric rays. A fish that carries a taser. A fish that does not need to chase. A fish that lets the electricity do the work. The shock is efficient. The energy cost is low. The result is immediate. Prey is disabled before it knows danger exists. It also has a worm-like lure inside its mouth. It wiggles this to attract curious fish. The lure is fleshy and pink. It wriggles in the dark water like a real worm. The prey comes close to investigate. The stargazer opens its mouth. The prey disappears. Two tricks. One mouth. The deception is complete. The trap is sprung. The meal is secured. The biology is ingenious. The method is brutal. Nature favours success over fairness. The Māori name Kourepoua means to dig or burrow into the ground. It perfectly describes its behaviour. The people who came before knew this fish. They saw the eyes staring from the sand. They gave it a name that fits. That is how names should work. Observation leads to understanding. Understanding leads to language. The language persists. The fish remains. The connection is unbroken. History records the habit. Science confirms the mechanism. Both are correct. The electric shock is not dangerous to humans. It feels like a strong static shock. Surprising but not painful. The stargazer does not want to shock humans. It wants to shock its dinner. Humans are not dinner. Probably. The intent is defensive. The outcome is startling. The risk is minimal. The encounter is rare. Most people never see one. Those who do remember the surprise. The memory lasts longer than the shock. Not targeted by commercial or recreational fishers. Too weird. Too electric. Too much trouble. It turns up occasionally as bycatch in set nets and bottom trawls. An accidental visitor to the deck. The catch is unintended. The handling is cautious. The release is quick. Or the discard is silent. Depending on the crew. And the mood. And the market. Which rarely values the strange. That is the spotted stargazer. Buried, staring, and electric. A fish that looks surprised. Acts like a trap. Carries a taser in its head. It carries on in the sand. Unseen. Unvalued. Unafraid. The ocean holds many such creatures. Hidden in plain sight. Waiting for the net. Or not. The choice is random. The outcome is uncertain. The shark persists. No one told it otherwise.