The scallop actually has two retinas, the upper retina and the lower retina.

扇贝实际上有两个视网膜，上视网膜和下视网膜。

The upper retina cells fire when a shadow crosses over the scallop, indicating a potential predator attack, and tell the scallop to escape.

当阴影越过扇贝时，上部视网膜细胞会发光，表示潜在的捕食者攻击，并告诉扇贝逃跑。