Underwater imaging is a research field and methodological approach dedicated to the acquisition, processing, and analysis of visual data within submerged aquatic environments. This discipline addresses the significant challenges posed by light attenuation and scattering in water, employing diverse techniques such as optical and acoustic modalities to capture information about submerged landscapes, biological organisms, and artificial structures. Its significance lies in enabling scientific exploration, environmental monitoring, resource management, and technological inspection in aquatic realms inaccessible to conventional terrestrial imaging.