Bradley Fisher, of Hudson, FL, met the girl through the Discord social media app, City officials said in a release.
Fisher asked the girl for pornographic images and sent ones of himself to her, authorities said.
Summit police received evidence launching a year-long investigation by the Pasco County Sheriff's Department Internet Crimes Against Children Unit -- ultimately leading to Fisher's arrest.
Fisher was charged with transmission of material harmful to minors, a third-degree felony in Florida, officials said.
"Online predators pose a security risk for children and teens," said Summit Police Chief Andrew Bartolotti, "and it is extremely important for parents to speak openly with their children about online activity."
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