Aquatic materials refer to substances and resources found in water environments, including oceans, rivers, and lakes. These materials can be biological, such as fish, seaweed, and plankton, or non-biological, like sand, rocks, and minerals. They play a crucial role in ecosystems, providing habitats and food sources for various aquatic organisms. In addition to their ecological importance, aquatic materials are also valuable for human use. They are harvested for food, construction, and industrial purposes. For example, shellfish and seaweed are commonly used in cuisine, while gravel and sand are essential for building and infrastructure projects.