You most likely have an oyster.
There is one introduced species; Crassostrea gigas and one native species; Ostrea edulis
You may use data, pictures,information etc. available ad the site, as long as you refere to the sourse.
The database as a whole is to be cited as follows:
NOBANIS. Available from http://www.NOBANIS.org. Data of access x/x/201x