A dead grey whale was discovered near the mouth of the Akwe River, raising concerns about a possible ship collision due to increased marine traffic from cruise ships and fishing boats in the area.

An algal bloom in Northern Norway dominated by Chrysochromulina and Phaeocystis has caused massive fish die-offs in recent weeks, with up to one million farmed fish reported dead around Astafjorden.

Since mid-March, seabirds and marine mammals that appear to have been infected with highly pathogenic avian influenza, which has a high fatality rate, have been confirmed on the eastern coastline of Hokkaido. 　Volunteers are conducting their own surveys in Nemuro City, and as of the 4th, a total of 614 dead seabirds, seals, and sea otters have been confirmed.

A six‑meter whale, likely a northern bottlenose whale, washed ashore in Njarðvík at Borgarfjörður Eystri on Good Friday. Locals notified Icelandic environmental authorities, but the carcass may remain on the beach over Easter.