Oil floating on the surface, it reacts with oxygen. The oxygen in the water decreases And blocking photosynthesis of phytoplankton, algae and aquatic plants such. Changing the decomposition of bacteria in the water.(Benthic fish, coral, etc.) as well as water-birds. The accumulation of toxins in the food chain, from manufacturer. (Phytoplankton) primary consumers. (Zooplankton / fish) to the final consumer, that is human.