Female guppies with smaller brains can distinguish attractive males, but they don't recognize them as being more appealing or choose to mate with them, according to a new study. The study adds weight ...

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 ...

The streams of Trinidad and Tobago are home to the most unexpected of landscape gardeners. They’re guppies – tiny and beautifully coloured fish, just an inch or so long. Without tools or plans, they ...

Female guppies with smaller brains can distinguish attractive males, but they don't recognise them as being more appealing or choose to mate with them, according to a new study by UCL and Stockholm ...