Fisheries Infosite

Horse Mussel Kermadec (HOR10)
Maori name
Scientific name
Atrina zelandica

Physical characteristics

Horse Mussels can grow to a maximum length of 400 mm, but on average only reach lengths of 260-300 mm.

Life cycle

Horse Mussels are thought to have a maximum age of around 15 years. Broadcast spawning occurs all year with a peak in the summer months.


Horse Mussels inhabit muddy-sand substrates in shallow intertidal and subtidal waters to depths of 50 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