Fisheries Infosite

Large trough shell Central (East) (MMI2)
Maori name
Scientific name
Mactra murchisoni

Physical characteristics

Large Trough Shell maximum length varies from 63-102 cm depending on location.

Life cycle

Large Trough Shell are broadcast spawners.


Large Trough Shell are found throughout New Zealand, but are most common in the South Island. They are most commonly found at depths of 4-8 m.

Key statistics
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 30/09/2025
2 Quota value and exports are calculated pro-rata to reported commercial catch for the 12 month period to 30/09/2025