West Bengal is rich with its enormous fish diversity; among these fish species recently some have been recognized as ornamental fishes due to their attractive coloration, shape, size etc. They are popularly known as indigenous ornamental fishes of West Bengal. The southern part of West Bengal holds a number of fresh water wetlands along with a vast estuarine area, which hold a number of indigenous ornamental fish species. So, a detail survey work has been conducted to collect in depth information on available indigenous ornamental fish species in four districts of South Bengal, namely North-24-Paraganas, South-24-Paraganas, Howrah and Kolkata. Seasonal variation of availability of the collected fish species in the four studied districts has also been recorded. This book will be helpful to gather basic knowledge about the available indigenous ornamental fish species of this particular part of South Bengal. Information on some possible conservation strategies for those indigenous ornamental fish species which have been observed to be present with low availability in the nature during the survey period has been noted down which will also be helpful for future endeavor.