all armour, no diplomacy

Size
Length: 7–12 cm
Lifespan
3–5 years
Diet
Carnivorous. Feeds on molluscs and crustaceans using raptorial claws.
Habitat
Rocky and sandy bottoms in subtidal zones. Prefers mixed substrate for shelter.
Range
North Island and northern South Island, New Zealand. Common in Hauraki Gulf.
Endemism
Endemic
Main Threats
Habitat loss from coastal construction and removal of rocks for breakwaters.
Population
Stable in coastal waters. Protected by armour from most natural predators.
Conservation Status
data_deficient
Human Risk
caution
Handling Note
robust exoskeleton and strong claws deter handling
Conservation Note
Marine crustacean outside the scope of current NZTCS terrestrial and freshwater assessments.
Te Ao Māori
The robust nature of this species mirrors the defensive strategies seen in other armoured marine life. While not culturally iconic, its resilience is a testament to the evolutionary pressures of the coastal zone.
Predators find it difficult to crush. The Armoured mantis shrimp has a thickened carapace and robust exoskeleton. It is built for defence as much as offence. When threatened, it retreats into crevices or burrows. It does not flee openly. Found throughout the North Island and northern South Island. It prefers areas with mixed substrate. Rock provides shelter. Sand allows for burial. The combination offers maximum security. It is common in the Hauraki Gulf. Threats are limited. Its armour protects it from many predators. Human collection is rare. Habitat loss from coastal construction is the primary concern. When rocks are removed for breakwaters, the shrimp loses its home. Diet includes molluscs and crustaceans. It uses its raptorial claws to break shells. The force is significant. It targets snails and small crabs. It is a regulator of benthic populations. Habitat specificity is moderate. It can adapt to different bottom types if shelter is available. Pure sand is risky. Pure rock is competitive. A mix is best. The shrimp seeks balance. It finds it where it can.