Officials with the National Oceanic and Atmospheric Administration’s Marine Fisheries Service have until April 18 to provide answers to New Jersey’s two U.S. senators on the unusual mortality events for humpback whales, North Atlantic right whales and gray whales.

Sens. Robert Menendez and Corey Booker, along with Richard Blumenthal of Connecticut and Jeffrey A. Merkley of Oregon, penned the March 28 missive to Janet Coit, assistant administrator for fisheries, National Marine Fisheries Service, expressing their “shared concern about the ongoing…