Underwater decorations are items placed in aquariums or natural water bodies to enhance the aesthetic appeal and provide hiding spots for aquatic life. These decorations can include rocks, plants, and artificial structures like castles or sunken ships. They help create a more natural environment for fish and other aquatic creatures, promoting their well-being. In addition to visual appeal, underwater decorations can also serve practical purposes. For instance, they can provide shelter for species such as shrimp and snails, helping to reduce stress and aggression among fish. Properly chosen decorations can also aid in maintaining water quality by supporting beneficial bacteria growth.