Hawaii has caught another stray opossum at Honolulu Harbor, a worrying sign for a state that works hard to keep invasive animals out.

• Matson workers found the animal in their freight facility, and state inspectors trapped it a day later using cat food and apples as bait.
• This is the 11th opossum captured in Hawaii in two years, showing the animals keep slipping in through cargo shipments.
• The opossum was euthanized and sent for rabies testing, since Hawaii is rabies-free and wants to keep it that way.
• No other opossums were found nearby, so officials believe this one arrived alone.

Outlook: Expect the state to keep tightening inspections at ports as stowaway animals keep showing up in shipping freight.