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Biology

Collective Decision-Making in Fish Shoals Under Predation Risk

Quick fact

Under predation risk, fish shoals can make collective decisions in less than a second, with information spreading through the group at speeds up to 30 km/h—faster than any individual fish can swim.

Why this is interesting

Imagine a school of fish suddenly veering left together, as if one mind controls the whole group. What if that unified turn is actually the result of each fish following a few simple rules?