Manila clams, a valuable seafood species, have established a breeding population in Boston Harbor. This marks the first known successful establishment along the northwestern Atlantic coast. Researchers discovered tiny live clams and numerous shells during recent surveys. The invasive species could compete with native shellfish for vital resources.

Manila clams, a valuable seafood species, have established a breeding population in Boston Harbor. This marks the first known successful establishment along the northwestern…

Scientists say invasive Manila clams have taken hold from Boston Harbor to Cape Cod, marking a first for the Atlantic coast.