Red Tide is cause of concern near Piney Point discharge in Tampa Bay âWeâre still at the very beginning of the Piney Point spill in Tampa Bay,â an environmental advocate says. Â Â A fisherman traverses a shipping channel on Friday off the coastal mangrove estuaries of Bishop Harbor and the Terra Ceia Aquatic Preserve near Port Manatee. [ DOUGLAS R. CLIFFORD | Tampa Bay Times ] Updated 4 hours ago TAMPA BAY â About 11 miles separate the area around Port Manatee, where an estimated 215 million gallons of wastewater were recently released into Tampa Bay, and the spot off Manatee County where water samples this week turned up a dreaded result: