Commercial size flat oyster (Ostrea edulis) of excellent quality, derived from domestic broodstock under a breeding programme selecting for high growth rates, high meat content and resistance to disease. Produced in a semi intensive cultivation system in zone A Atlantic waters, certified Bonamia spp.-, Marteilia spp.- and Perkinsus spp.-free. Purified in microfiltered, sterile seawater under European Union sanitary authorisation.

Although the product is at all times kept under refrigeration (4-5 ºC) and originates from zone A waters, free of the main diseases, purification in chlorinated or ozonized seawater is advisable (24-48 h, 12-14 ºC).