Garfish

Fascinating facts about the Garfish

• A garfish can grow to about 22 cm (8.7 in) and rarely exceeds 40 cm (16 in), yet it can live nearly a decade, showing how a modest size still supports a relatively long lifespan for a small inshore fish.
• Its lower jaw stretches longer than the head itself and ends in an orange tip, turning the mouth into a built-in sensor that picks up vibrations of tiny crustaceans near the surface.
• Despite being a nocturnal planktivore, the garfish lacks a tapetum lucidum, so it relies on a highly developed lateral line rather than sight to locate prey in the dim evening waters.
• These fish form tight, localised schools that drift close to the surface by day and move into harbours and estuaries at night, a habit that draws predators ranging from kingfish and dolphins to gannets, shags, and penguins.
• Endemic to New Zealand, the garfish spawns in shallow bays at the end of spring, letting its adhesive eggs stick to seagrass; this reproductive strategy keeps populations highly local, making them vulnerable to over-harvesting in any single harbour.

At a glance

About the Garfish

The New Zealand garfish (Hyporhamphus ihi), known also as piper or takeke, glides through shallow inshore waters with an elongated, slender silhouette crowned by a striking long lower jaw tipped in orange. Growing to about 22 cm (8.7 in), its greenish-blue back mottled with brown flecks blends seamlessly with seagrass meadows, while a silver-white belly mirrors the sunlit surface. A silver stripe runs from the base of the pectoral fin to the tail, and the dusky pectoral, dorsal, pelvic and caudal fins provide agile maneuverability; the dorsal fin, soft and unsupported by spines, stiffens via cartilage when sharp turns are needed. Its hypocercal tail, forked with a dominant lower lobe, propels the fish forward, while the anal fin adds further stability. Beneath the surface, the garfish’s sensory marvel is its extended lower jaw, packed with tricuspid teeth and a lateral-line system that detects minute vibrations, allowing it to hunt nocturnally without relying on sight. This adaptation lets it skim the water’s skin at night, feeding on eelgrass, seaweed, zooplankton, mysids, crab and polychaete larvae, while its schooling habit draws predators such as kingfish, dolphins, gannets, shags and penguins.

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