NORWALK - Biologists at the University of New Haven announced that an invasive string of sea squirts has shown up in the waters off southwestern Connecticut.

According to officials, the scientific name for the slug-like species is Styela Clava. They say the specimens travel mainly on the bottom of boats and originated in Korea, but have migrated to Europe and North America over decades.

Researchers say the sea squirts have never before been spotted locally and could be a serious threat to the area's shellfish industry. However, only small clusters have been spotted so far.

Biologists say they're trying to keep track of where the creatures are migrating and are asking people to report any sightings to the University of New Haven.