09 July 2026

Scientists identify an alga species as the culprit behind the deaths of more than one million marine animals.

A dead snapper that washed ashore in southern Australia in 2025 during a marine die-off caused by a toxic algal species. Credit: Tracey Nearmy/Getty

A little-known type of alga dominated the deadly algal bloom that killed around one million marine animals in Australia in 20251.

Access options