Indigenous Technical Knowledges (ITKs) in the field of Fisheries science in India requires proper attention. Many ITKs have been recorded from different states of the country in fields of Aquaculture, Fishing Technology and Fish Processing. This article deals with report of certainITKs being practiced in Aquaculture and Fishing Technology in different regions of Tamil Nadu. The article also stresses the need for evolving a new branch of Ethno Fisheries science similar to Ethno Veterinary science in order to document and validate ITKs presently available in the field of Fisheries science both within the state as well as in different states of the country.