Convoluta roscoffensis and the Amoco Cadiz oil spill

The intertidal symbiotic flatworm, Convoluta roscoffensis, was found on the sandy beach at Dunes de Ste. Marguerite 4 months after heavy pollution by oil from the Amoco Cadiz. Seven of the nine sites recorded 2 years previously had colonies of worms. The colonies were fewer and smaller, but densities within colonies were unchanged.