The New York Department of Environmental Conservation said the Shinnecock Canal in Hampton Bays was closed at 3 a.m., trapping a large and dense school of Atlantic menhaden (bunker) fish. The DEC said it believes the fish died due to a lack of oxygen and a high density of fish in the water.
The DEC said once the Suffolk County Department of Public Works opened the canal locks at 10 a.m., a lot of the fish washed downstream — some of them still alive.
“The large school of fish was most likely chased into the canal by other predatory fish,” the DEC said in a statement.
According to the DEC, the fish kill does not suggest there’s pollution in the Shinnecock Bay. Though, a similar die-off happened in Riverhead in June 2015.
— emb (@edenbenard) November 14, 2016
As a precaution, the Suffolk County Health Department has collected water samples to test for pathogens and pesticides.
Regional Department of Environmental Conservation spokesman Bill Fonda says fish kills happen when a large number of fish get trapped in a confined area and the oxygen levels go down, leading to suffocation. Source