Insight into the processes of evolutionary change can be obtained by studying the distribution of genetic diversity among populations. Such diversity can be shaped by historical colonization events, ...

When Robert Heathcote dips his head into the rivers of Trinidad, he’ll often see little black dots moving through the water, even when it’s murky. Those dots are the eyes of small, inch-long fish ...

The guppy has long been a workhorse for biologists like me who are interested in understanding the mating decisions that animals make and the evolutionary forces behind those decisions. Male guppies ...

Guppies can be fooled by optical illusions into believing objects are smaller or larger than they really are. This suggests they might not always make the best choices in their natural environment.

Thank you for signing up! Did you know with a Plus subscription to Shropshire Star you get full access to our award winning journalism for the news that matters to you and more. When they looked how ...

Different breeds of tropical fish can have massively different lifespans, ...

They may not show it, but fish have complex personalities, research suggests. The discovery was made by scientists studying individual traits in tiny fish called Trinidadian guppies. When they looked ...