Fragging idoiot DICKHEADS!!!
Those people honestly lack the knowledge of the fish and run off of biased, dickheaded stereotypes (stereotypes are never true 100% by the way).
Just let him keep the fish, leave him be, and make him make sure that he never releases it. I mean, WTF is wrong with those guys? And seriously, its not like America is the only one with invasive species problems. Us Filipinos have had a Pleco pest problem and a Tilapia invasion for years now. And we haven't even banned any of these fishes and their relatives! Let alone be racist about fish. Stupid Snakehead movie.