Expérimental
The collective behavior of fish is an astonishing example of coordinated movement that emerges spontaneously on a large scale despite limited communication between individuals. Recently, we have challenged the collective behavior of fish by forcing the fish school to pass through a bottleneck. This experiment revealed that, unlike humans, fish still respect social distance upon emergency evacuation which renders the evacuation more efficient. To go further and reveal cognitive effects, we want to repeat the evacuation experiments but with two openings. By varying the opening size and the distance between them, we aim at characterizing the gregarious instinct of fish.