Microplastic pollution in oceans poses a significant threat to marine biodiversity, impacting organisms at every level of the food chain. These tiny plastic particles, often less than 5 millimeters in size, originate from various sources, including the breakdown of larger plastic debris, microbeads in personal care products, and synthetic fibers from clothing. Once in the ocean, microplastics are ingested by marine organisms ranging from plankton to larger fish and marine mammals, leading to physical harm, chemical contamination, and even death. Microplastics can cause blockages in digestive systems, reduce nutrient absorption, and lead to starvation in smaller marine species. They also absorb toxic chemicals from the surrounding water, which are then transferred up the food chain as predators consume contaminated prey, potentially impacting human health when seafood is consumed. The disruption of marine ecosystems due to microplastic pollution can lead to a decline in biodiversity, as certain species may become more vulnerable to extinction. Innovative solutions are being developed to address microplastic pollution. These include advanced filtration systems in wastewater treatment plants to capture microplastics before they reach the ocean, and the development of biodegradable plastics that break down more easily in the marine environment. Researchers are also exploring natural solutions.