Dogfish is another name for a Bowfin. Seems to be not very smart to be snorkling afier dark away from the bank. But you know, "They walk among us!" Duh!!! I've seen guys in Michigan snorkling at night but they had a innertube type float with a flag sticking above it but no light on it but they had lights with them under the water. To each his own.Teach
I'm leaning toward the opinion the guy was most likely using the dark of night to get a mess of fish.