a list of images are attached below which are related to the Indian pearl oyster Pinctada group. Would appreciate if you can confirm the species. Sometimes the pearl oysters also have polymorphic colouration.
We were able to determine 6-7 carotenoids in oysters Crassostrea gigas Thunberg and Ostrea edulis, but 17% remained undefined. We did not continue their studies due to lack of the necessary amount of clams.