Scallops have eyes. Not just two eyes, like humans have, or eight, like most spiders do, but up to 200 of them, each clasped by a thin, wavy tentacle protruding from the inner edges of the corrugated shell. Considering how rudimentary a scallop’s brain is, these eyes are surprisingly sophisticated. Play a scallop a video of juicy particles drifting by in the water, as researchers at the University of South Carolina have done, and it will likely open its shell, as if to take a bite.
It’s possible, at a stretch, to say what’s going on here. The scallop’s eyes transmit visual information to its brain, which creates a picture, however fuzzy, of some juicy plankton approaching, and it springs into action. The shell opens wide, the plankton floats in, and snap! Dinner is served.
