It's the first rule of the nightclub - and it appears fish adopt it too. When it comes to reeling in a mate, scientists say fish surround themselves with ugly friends - because they look so good by ...

To see how harassment affects the female social bonds, the researchers put each of three pairs of small guppies (a random mix of females and small males) into a transparent cylinder, with all ...

Canadian evolutionary scientists say claws are used by the male guppy fish to treble the amount of sperm transferred to reluctant females Added the species has evolved to benefit males at the expense ...