Instant Genius: Fish

Fishing damages entire ecosystems and pollutes our oceans. So would we be better off without it?

So-called ‘environmental DNA’ is helping conservationists keep track of marine species

Fish can recognise members of the same species and tell if other fish are siblings, but they probably can’t identify themselves.

E. voltai can produce a shock of 860 volts.

Though less sensitive to cold, fish feel pressure much more strongly than mammals.

Fish follow a few simple rules to form complicated choreography in groups.