The mussel, which matures after one-year, is endemic to New Zealand with distribution restricted to the lower intertidal range, hence it has low to moderate fishing pressure. The stock is not well-monitored, and there is only limited information available on this species.
Hand collection is a very selective fishing method. There is no bycatch, and discard rate of this fishery is extremely low with high survival rates. The fishery is not causing significant negative ecosystem changes. There is no impact on vulnerable habitats.
Management is considered partly effective mainly due to a lack of specific data and management measures applied to hand fish techniques.