Volcanic ash from eruptions of Mount Anak Krakatau entering the waters does not automatically pose a threat to the marine ecosystem. Experts from IPB University have provided a scientific explanation regarding this matter. The ash’s impact isn’t necessarily detrimental and depends on various factors, including concentration and composition. Further studies are needed to fully understand the long-term effects on the waters surrounding Anak Krakatau. The initial assessment suggests the ecosystem is resilient but continuous monitoring is crucial. The eruption and subsequent ashfall require ongoing scientific observation to protect the biodiversity of the area. This analysis offers a preliminary understanding of the potential environmental impact.