In anatomy, an eyestalk is a protrusion that extends the eye away from the body, giving the eye a better field of view than if it were unextended.

How does Eyestalk ablation work?

Removing, or the ablation of, one of a shrimp's eyestalks reduces the levels of a hormone that prevents reproduction, allowing shrimp to mature faster and release more eggs, as well as making egg production more predictable and efficient.

How do eyestalks work?

When an animal with an eyestalk feels threatened, such as when the stalk is touched, it will retract its eyestalks, thus bringing its eyes close to its head in order to protect them. It does this by pumping blood in or out of the eyestalk.