A consortium of environmental and fisheries activist groups is calling for a moratorium on all offshore wind-related activities along the US states of New Jersey and New York after seven whale carcasses recently washed up on their beaches.

Since 5 December, four humpback whales, two sperm whales, and a juvenile critically endangered North Atlantic right whale were discovered. The causes of death remain unclear.

In a letter to President Joe Biden, Clean Ocean Action, along with several organisations opposed to offshore wind, insisted that the National Oceanic and Atmospheric Administration (NOAA)’s Fisheries bureau conduct an immediate investigation into the “unprecedented number” of dead whales.