Four European species will be studied during this project. First, the Pacific oyster, the most known in hatcheries, and three others for which interest is increasing.

Flat oyster Ostrea edulis has been deliberately excluded from this project because other European projects have already focused on pathological or breeding aspects of this species. Moreover, output from a recent Research for SMEs project (‘SETTLE’) dedicated to the reproduction and settlement is expected to address future needs of this species.