You can sometimes see great light shows at Weekapaug in the fall. All black out there then , here and there ,the blue glows. Not little tiny spots but big areas about 3 feet across. Or maybe its many little ones all together in an area glowing. Sometimes big areas moving. You know that's a fish disturbing them as it swims by causing them to flouresce. And you know the real big glows must be real big fish!
I've seen it dozens of times there.