Aquatic organisms have unique physical attributes that allow them to survive in water. These adaptations include gills for oxygen absorption, streamlined bodies for efficient swimming, and specialized feeding mechanisms. Fish, for instance, have lateral lines that sense pressure changes, helping them detect movement in water. Some species, like certain shellfish, have hard exoskeletons that protect against predators and harsh environmental conditions. Aquatic plants also exhibit adaptations, such as air sacs, that keep them buoyant. In aquaculture, understanding these attributes aids in creating environments that promote growth and health, as well as in selecting species suitable for farming.