Oysters can be farmed, raked or dredged. Rock oysters are generally farmed on ropes in oyster farms in tidal estuaries. The tide brings in the nutrients needed for the oysters to grow. Rock oysters in New Zealand are generally named from where the oyster farms are located. Some well known farms are Clevedon Coast, Mahurangi oysters, Te Matuku oysters or Kaipara oysters. Rakes oysters are simply gather from their beds, using a rake. Provide better control on size and less damage to the beds. Dredged oysters are raked from the sea floor where known natural oyster beds are. This method of harvesting is strictly managed. With quota numbers and short seasons, to keep the oyster stocks in good shape each year.