Let’s get started! The guppy (Poecilia reticulata) is the most popular livebearer species and one of the world’s favorite tropical fish! These stunning creatures are a staple in the aquarium ...

Not only have guppy numbers more than doubled under the relatively low level of predation, but also, after only four guppy generations, the percentages of drab males to bright males have evened ...

In the same pool you've placed about 30 rivulus, one of the least voracious of all guppy predators. These predator fish, which typically occupy the highest reaches of guppy streams, generally eat ...