Manufacture and delivery of oysters nursery tanks made of fibreglass reinforced polyester. Used to oysters pre-fattening in hatchery. They may contain 20 mesh tubes (Ø315) or 14 mesh tubes (Ø500). Oysters nursery tank can be install in exterior or interior, a food-grade gelcoat interior and a topcoat exterior protect the tank it from external aggressions. Oysters nursery tank is shock-resistant, modular and durable. A pumping system with a seawater storage allows a water closed circuit circulation.