||Light Pollution is a growing concern for man and the environment. As awareness of the issue grows, various studies reveal its hitherto unnoticed effects on various organisms and ecological processes. The aquatic ecosystem has not been untouched by its influence either, and although much research is still required in the field, an attempt has been made to compile studies and reviews on the effects of Ecological Light Pollution on the world under water. Light has both direct and indirect influences on aquatic systems, and some possible consequences on various aspects of aquatic ecology have been extrapolated from existing studies. It has been attempted to bring attention to some implications that Ecological Light Pollution may have for the aquatic communities, and the aspects that require further investigation for a better understanding of the consequences of increased artificial illumination for entire aquatic ecosystems.