![Green-lipped mussels growing on longline underwater in NZ.](http://static.sciencelearn.org.nz/images/images/000/000/842/full/farmed_mussels_on_longlines_large20160302-30949-1reu3oo.jpg?1674165052)
Green-lipped mussels growing on longlines on a New Zealand mussel farm. The longline technique was modified by early mussel farmers in New Zealand from a Japanese technique for growing oysters. Virtually all farmed mussels in New Zealand are now grown in this way.