Why fish don't need to be schooled in the art of swimming

How do fish swim in schools, effortlessly coordinating their every move? The answer appears to be ingrained in their genes.

The genetic basis underlying the complex, social behavior of schooling is revealed in two studies published Sept. 12 in the journal Current Biology. The studies suggest that schooling is not a learned behavior, and instead show it relies on several regions of the fish genome.

Source: Here