Three-spine sticklebacks aren't as pretty as many aquarium fish, and anglers don't fantasize about hooking one. But biologists treasure these small fish for what they are revealing about the genetic ...

Craig Birchall, 25, landed a stickleback weighing 0.4oz (12 grams) and three inches long. The fish – the weight of a £2 coin – is 0.1oz heavier than one he caught last year. Article continues below ...

As fish in different parts of the world adapted to live in fresh water, the same sites in the genome were changed time and again. Investigator, Stanford University As fish in different parts of the ...