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 ...

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 ...

Beyond the usual goldfish and guppies, here are ten unique and captivating fish species that can bring an element of the ...

Cousins to the well-known guppy, pupfish are not only playful but are ... and competition from nonnative species. The Center first championed the fish in 1996 when we filed a lawsuit resulting in the ...

But for a fish that spends its life ... Look for color trends in the guppies. These may vary relative to the presence or absence of specific predator species in the pools.