Changes in light and motion and very rough images are registered on the retinas of the mollusc. Should you caste a shadow over a collection of scallops attached lightly to the bottom, the scallops will often pull up their anchors and swim away awkwardly by flapping their two shells together. These bivalves can have thousands of small eyes dotting the edge of the mantle. However, the eyes are relatively simple photoreceptors, not the sophisticated lens-bearing eyes of the scallop. This material may be copied for use in student classroom projects and reports.
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