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?