While wildlife officials moved quickly Tuesday to confiscate five baby alligators at an Augusta bus depot, smaller invasive species such as green crabs and pike are a more serious threat to Maine’s natural world.

Police also charged Quincy Tremaine Abrams, 36, with possession of a firearm by a prohibited person.

Yifan Sun, 20, told police that he kept the alligators in an Augusta home and was taking them with him on a visit to someone in Waterville.