Credit: Martin Pelanek / shutterstock; Disney / Pixar If a piece of information is repeated often enough, it will eventually be believed, even if there is no evidence for it. One example of this features the friendly clownfish Nemo and his side-kick Dory, a blue tang fish, who you may know from the animated blockbusters Finding Nemo and Finding Dory. Everyone loves Nemo. But to some, his rise to global stardom in 2003 had a darker side, as news outlets around the world reported that the popularity of the movie was leading an increasing number of people to buy clownfish as pets. These articles claimed that this increase in demand was a threat to wild populations . While there was little to no evidence to support this story, with so much repetition, the so-called Nemo Effect became conventional wisdom. So it wasn’t surprising that before its sequel, Finding Dory, was released in 2016, a chorus of voices, including Ellen DeGeneres wh