Taxonomy
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Cichliformes
- Family
- Carangidae
- Genus
- Decapterus
- Species
- koheru
Habitat
Koheru inhabit pelagic waters of the Southwest Pacific Ocean, particularly around New Zealand, including coastal areas and offshore environments. They prefer depths from the surface down to about 200 meters, often near reefs or open water. These fish thrive in temperate marine conditions with moderate currents.
Diet
Koheru primarily feed on zooplankton, small fish, and crustaceans, which they capture while swimming in schools. Feeding activity peaks during the day, especially in the morning and evening when prey is abundant. They use their fast swimming to pursue and engulf small prey items.
Behavior
Koheru are highly schooling fish, forming large groups that provide protection from predators and aid in feeding. They are diurnal, actively swimming and foraging during the day, and exhibit seasonal migrations to follow food sources. These fish can be territorial around feeding areas but generally prioritize group cohesion.
Fishing
Target Koheru in the pelagic waters of the Southwest Pacific, particularly around New Zealand's coastal and offshore areas near reefs or open waters at depths from the surface to 200 meters, using effective trolling or casting techniques with light to medium tackle—such as a 6-8 foot rod with 10-20 lb test line and a reel suited for fast retrieves—to mimic their schooling behavior and pursuit of small prey. Opt for small lures like spoons, jigs, or flashy metal lures that imitate zooplankton, small fish, or crustaceans, or use live bait such as shrimp or sardines for reliable strikes; these setups allow for precise presentations during their active feeding times. The best season is from November to March, coinciding with their spawning period, when fishing is most productive in the morning and evening hours as they school and feed aggressively. Koheru typically grow to 15-30 cm, with record sizes up to 40 cm and 2 pounds, though specific IGFA records are not established. As a key species in recreational fishing, adhere to New Zealand's management tools like catch limits and seasonal guidelines, which help maintain stable populations—supported by angler-funded programs that fund habitat restoration and conservation efforts in these temperate marine environments, ensuring sustainable fishing practices for future generations.
Conservation Status
Listed as Not Evaluated by IUCN.