The middle intertidal zone is a coastal area that is regularly exposed and submerged by ocean tides. It lies between the upper intertidal zone, which is rarely underwater, and the lower intertidal zone, which is mostly submerged. This zone experiences varying conditions, including changes in salinity, temperature, and moisture, making it a unique habitat for various organisms. Organisms in the middle intertidal zone include barnacles, mussels, and seaweeds, which have adapted to withstand both wet and dry conditions. These species play a crucial role in the ecosystem, providing food and habitat for other marine life. The middle intertidal zone is also important for studying the effects of climate change and human activity on coastal environments.