https://www.scientificamerican.com/article/how-do-we-prevent-pets-from-becoming-exotic-invaders/

This summer a professional trapper caught an alligator in a lagoon in Chicago’s Humboldt Park, following a weeklong search that drew crowds of onlookers and captured national headlines. Dubbed “Chance the Snapper,” after a local hip-hop artist, the five-foot, three-inch reptile had likely been let loose by an unprepared pet owner, say experts at the Chicago Herpetological Society (CHS). This was no anomaly: pet gators have recently turned up in a backyard pool on Long Island, at a grocery store parking lot in suburban Pittsburgh (the fourth in that area since May) and again in Chicago.

Keeping a pet alligator is illegal in most U.S. states, but an underground market for these and other exotic animals is thriving—and contributing to the proliferation of invasive species in the U.S. and elsewhere. As online markets make it steadily easier to find unconventional pets such as alligators and monkeys, scientists and policy makers are grappling with how to stop the release of these animals in order to prevent new invasives from establishing themselves and threatening still more ecological havoc. New research suggests that simply banning such pets will not solve the problem and that a combination of education, amnesty programs and fines might be a better approach. Many people who release pets may simply be unaware of the dangers—both to the ecosystem and the animals themselves—says Andrew Rhyne, a marine biologist at Roger Williams University who studies the aquarium fish trade. People may think a released animal is “living a happy, productive life. But the external environment is not a happy place for these animals to live, especially if they’re not from the habitat they’re being released into,” he says. “The vast majority of [these] species suffer greatly and die out in the wild.”