(CBS) — Customs and Biosecurity officers at the Port of Saipan intercepted and contained two black widow spiders aboard the vessel APL Islander on Sept. 17, 2025, during what began as a routine inspection.
The APL Islander arrived at 7 a.m. and was scheduled for inspection at 8 a.m. Capt. Martha Teregeyo led a four-officer team conducting both vessel inspections and document clearances.
At 8:48 a.m., CBS Officer Ramon Borja discovered a black widow spider beneath a container. Officers quickly secured the spider, and No Ka Oi — a certified pest control contractor — was called in to administer pest control treatment. The pest control team arrived at 10 a.m., began treatment at 10:22 a.m., and completed it just before 11 a.m.
After the recommended waiting period, CBS officers conducted a final sweep of the vessel, discovering and securing a second black widow spider. Officers then inspected 49 containers slated for offloading in Saipan, concluding by 4 p.m. with no additional invasive species detected.
In addition to the black widow spider interceptions, CBS officers also discovered Little Fire Ants on separate occasions at the Saipan and Tinian seaports. The LFAs were intercepted aboard vessels arriving from Guam. The ants were treated immediately in coordination with pest control partners, preventing the potential spread of this highly invasive pest.
“Our biosecurity protocols are essential to safeguarding the islands from harmful pests and protecting the well-being of our communities. While facilitating the efficient movement of goods from our ports to importers helps sustain our economy, our foremost responsibility is to secure our borders and intercept any goods that pose a risk before they enter the country,” said Jose Mafnas, director of Customs and Biosecurity.
CBS officials emphasize that the rapid response prevented a potential invasive species outbreak and underscores the importance of collaboration between CBS officers, shipping agents, and the Saipan Stevedoring Company.
“Great job to CBS officers and partners for stopping invasive pests at our ports. Their quick action protects our islands and shows how vital biosecurity is,” said Tracy B. Norita, Secretary of Finance.
Invasive species are harmful because they disrupt the natural balance of ecosystems. Invasive species often outcompete native plants and animals for resources like food, water, and space. This can lead to the decline or extinction of native species. Many invasive pests damage crops, livestock, and forests, leading to reduced yields and increased costs for farmers and communities. Some invasive species, like the Little Fire Ant or mosquitoes, can cause painful stings, allergic reactions, or spread diseases.
