Introduced and invasive species can present big problems, particularly when those species are charismatic. Some introduced species, like zebra mussels, tend to be reviled by the public, and people willingly adhere to strict management policies. However, if an animal has that elusive quality of charisma, people often don't want it to be controlled, even if it's harming the environment. Inevitably, these imbalances in public perception of introduced species influence the way those organisms are managed.