Oysters actively participate in gender switching!
That is correct. They can transition from one gender to another at any time. The switch is determined by which is most suitable for mating at the time. Oysters normally begin as males and mature into females. Another fascinating oyster truth is that the substrate to which it attaches itself shapes this sea species! It adheres to the surface occupied by a cluster of oysters (known as the bed) and continues to build around it.