Experts say the fish compete with native species for food, and they're unlike anything else found in the Delaware Valley Watershed.

a large adult snakehead was caught by a fisherman in South Fork Catawba River. Most snakehead fish avoid contact with humans, and those in captivity act shy around people, according to the USGS.

The South Fork Catawba Basin includes some of the most rural areas in the Catawba River Basin — and some of the most quickly changing areas. Towns west of Charlotte, such as Gastonia ...