IPIMAR’s scientists Frederico Batista and Ana Grade, and Deborah Power of CCMAR, clarified that this finding is incredibly rare and that they had never seen anything like it in their 10 years of observation and study of the species.
Two out of 756 oysters harvested in different places in Algarve, which included Alvor estuary, Ria Formosa and river Guadinana, contained pearls.