Newly Discovered Marine Fungus Algophthora Mediterranea Identified as Natural Predator for Toxic Mediterranean Algal Blooms

Scientists discover Algophthora mediterranea, a marine fungus that kills toxic algae, providing a natural way to control harmful coastal blooms.

By: AXL Media

Published: Mar 7, 2026, 6:35 AM EST

Source: The information in this article was sourced from Yokohama National University

The Discovery of a Microscopic Ocean Guardian

Marine biologists at Yokohama National University, in collaboration with the Institut de Ciències del Mar, have identified a previously unknown genus of fungus that acts as a lethal predator against toxic algae. Named Algophthora mediterranea, this microscopic organism belongs to the chytrid family, a group of aquatic fungi known for their parasitic lifestyles. The discovery suggests that these hidden fungal populations may play a far more significant role in controlling ocean populations than science previously acknowledged, acting as a natural check against the rapid expansion of harmful microorganisms.

Targeting the Toxins of the Mediterranean Sea

The primary target of this newly identified fungus is Ostreopsis cf. ovata, a dinoflagellate responsible for increasingly frequent toxic blooms along Mediterranean coastlines. These algae produce ovatoxins, which can aerosolize and cause severe respiratory distress, skin irritation, and eye inflammation in beachgoers and coastal residents. By infiltrating the cellular structure of these algae, Algophthora mediterranea effectively neutralizes the source of these toxins, offering a biological pathway to mitigate the health risks associated with seasonal algal proliferations.

Mechanism of Parasitic Infection and Cellular Destruction

The infection process begins when the fungus attaches to the host algae and injects its own genetic material into the cell. According to PhD student Núria Pou-Solà, the lead researcher, the fungus develops an irregularly shaped zoosporangium within the host, eventually consuming the algae's internal resources and leading to its death within just a few days. This aggressive feeding strategy was documented through high-resolution scanning electron microscopy and time-lapse photography, which captured the rapid transition from initial contact to the complete collapse of the toxic algal cell.