Why does the beach smell bad?

The beach can sometimes smell bad due to the presence of decomposing organic matter, such as seaweed, fish, and other marine life. Additionally, stagnant water or pollution from nearby sources, like sewage or runoff, can contribute to unpleasant odors. In some cases, the smell may also arise from certain types of algae, particularly during algal blooms, which can produce toxins and foul scents.