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 ...

To marine biologists, the guppy (scientific name Poecilia reticulata), AKA the rainbow fish or the millionfish, is one of the world’s most popular tropical fish and one of the most widely ...