People credited with this unit standard are able to describe: the GreenshellO mussel; the structures and methods of GreenshellO mussel farming in New Zealand; the location and history of GreenshellO mussel farming in New Zealand; the GreenshellO mussel farming industry structure and size in New Zealand; the consumer products and the consumer markets for the GreenshellO mussel; and features of good mussel farming practices and methods for dealing with harvesting vessel discharge.