Seas are large bodies of saltwater that are smaller than oceans and are partially enclosed by land. They play a crucial role in Earth's ecosystem, providing habitats for countless marine species. Seas are also important for human activities, such as fishing, shipping, and recreation. Popular seas include the Mediterranean Sea and the Caribbean Sea. Seas are often connected to oceans, but they can have unique characteristics due to their location. For example, the Red Sea is known for its warm waters and vibrant coral reefs. Additionally, seas can influence local climates, making coastal areas more temperate and suitable for agriculture.