Recently, numerous floating ‘small brown balls’ have appeared in coastal waters off Guangdong Province, drawing public attention. Marine experts have identified these objects as aggregations of sea grapes (Caulerpa lentillifera) or other macroalgae formed under specific environmental conditions. They typically appear spherical with a rough surface, ranging in color from light brown to dark brown and measuring between 1 to 5 centimeters in diameter.Such phenomena commonly occur in nearshore waters where water temperatures rise, nutrient levels are high, and currents are weak. Although visually unusual, these ‘brown balls’ are not pollutants and are generally non-toxic, posing little risk to marine ecosystems or human health. However, excessive accumulation could potentially block sunlight and reduce oxygen exchange in localized areas, exerting mild stress on benthic organisms.Experts advise the public not to panic upon encountering these formations during beach visits but also to avoid touching or taking them home. Local authorities have enhanced monitoring efforts to assess their origins and potential ecological impacts. As climate change and marine eutrophication intensify, similar occurrences may become more frequent, underscoring the need for continued vigilance and strengthened marine conservation measures.
近日，广东部分海域惊现大量漂浮的‘小棕球’，引发公众关注。经海洋专家鉴定，这些‘小棕球’实为海葡萄（Caulerpa lentillifera）或其他大型绿藻在特定环境条件下形成的聚集物。它们通常呈圆球状，表面粗糙，颜色从浅褐到深棕不等，直径多在1至5厘米之间。此类现象多出现在水温升高、营养盐富集及水流缓慢的近岸海域。虽然外观奇特，但‘小棕球’本身并非污染物，也不具毒性，对海洋生态和人体健康一般无害。不过，若大量堆积可能影响局部水域的光照和氧气交换，进而对底栖生物造成一定压力。专家提醒，公众在海滩游玩时如遇此类物体，无需恐慌，但也不建议随意触碰或带回家中。相关部门已加强监测，以评估其成因及潜在生态影响。未来，随着气候变化和海洋富营养化问题加剧，类似现象或更频繁出现，需持续关注并加强海洋环境保护。
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