Fisheries Infosite

Hapuku & Bass Challenger (HPB7)
Maori name
Scientific name
Polyprion oxygeneios, P. americanus

Physical characteristics

There are two species of Groper in New Zealand, commonly known as Hapuku and Bass. Both species are grey-blue or grey-brown on top and white on the underside. Hapuku can grow to a maximum length of 150 cm, though most adults are 70-100 cm. Bass are larger, growing to a maximum length of 200 cm, though most adults are 80-110 cm.

Life cycle

Both species of Groper are long-lived, with maximum age estimates from 40-60 years. Hapuku reach maturity at 10-12 years. Spawning for both species takes place in winter.


Groper are found throughout New Zealand. They live in areas with rough ground from the central shelf to the shelf edge at depths to 500 m. Groper feed on red cod, tarakihi, blue cod, hoki, and squid.

Key statistics
Recreational significance Medium
Customary significance Medium
Reported commercial catch1 (tonnes)
Quota value estimate2 (NZ$m)
Exports estimate2 (NZ$m)
1 Reported commercial catch is calculated for the 12 month period to 30/09/2020
2 Quota value and exports are calculated pro-rata to reported commercial catch for the 12 month period to 30/09/2020