Strait of Hormuz Closure Risks Introducing New Marine Species Worldwide

The prolonged closure of the Strait of Hormuz has trapped around 1,500 ships, creating a fertile ground for marine biofouling. As these vessels remain anchored, a diverse mix of plankton, plants, bacteria, viruses, larvae, and macrofauna like shellfish and anemones attach to their hulls. This "biofouling" poses a significant ecological threat, as these accumulated organisms could be transported globally when shipping resumes.

Specialists warn that these marine hitchhikers risk becoming invasive species in new ecosystems, potentially causing widespread ecological and economic damage. The zebra mussel, originating from Eastern Europe, serves as a stark historical example. It spread across North America in the 1980s, devastating native mussel populations and damaging hydroelectric plants. Its presence is now noted across Europe, including Switzerland since 2014.

The current situation in the Persian Gulf highlights the interconnectedness of global trade and environmental risks. The extended blockade not only disrupts maritime commerce but also creates a unique, albeit unintentional, experiment in marine species dispersal. The long-term consequences of these organisms establishing themselves in new environments remain a serious concern for marine biologists and environmental agencies worldwide.