NEW ORLEANS - A group of landowners along the Gulf Coast and three oyster fisheries in Louisiana on Nov. 1 officially opted out of BP PLC's proposed $7.8 billion settlement for economic loss and medical claims arising from the oil spill caused by the explosion of the Deepwater Horizon oil rig and filed lawsuits in Louisiana federal court seeking damages from the company (Wolf Bay, LLC, et al. v. BP Exploration & Production Inc., et al., No. 12-cv-02663, Pearl River Fisheries of Louisiana LLC, et al. v. BP Exploration & Production Inc., et al., No. 12-cv-02665, E.D. La.).