Next up, we’ll meet five different types of livebearers and learn how ... are big enough to avoid being eaten by other fish. The Endler’s livebearer (Poecilia wingei) is the smallest species ...

If flashiness is a liability, why are these little guys such exhibitionists? When evolutionary biologist John Endler began studying Trinidad's wild guppies in the 1970s, he was struck by the wide ...