Dead menhaden cluster at a Navesink River dock in Fair Haven last week. (Photo by Bernie McSherry. Click to enlarge.)

By JOHN T. WARD

A massive fish kill in the Navesink and Shrewsbury rivers in recent weeks is “the most severe mortality event in recent memory,” but New Jersey environmental officials still don’t know why it’s targeting only one species, Clean Ocean Action reported Thursday.

The environmental advocacy group also pressed the state to remove at least some of the dead fish from Red Bank-area waters.

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Dead fish littered the Fair Haven boat launch on Battin Avenue last week. (Photo by John T. Ward. Click to enlarge.)

Clean Ocean Action has called on New Jersey environmental and health officials to hold a virtual town hall to provide updates and guidance for towns along the Navesink and Shrewsbury rivers, where massive menhaden die-offs have occurred recently.

“The cause, extent, and magnitude of the die-off is deeply concerning and raising alarm throughout the region,” COA executive director Cindy Zipf and staff scientist Swarna Muthukrishnan wrote Friday. “Feeding the concern is the lack of answers, conflicting answers, and lack of proactive response to the ever-increasing dead fish.”

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