Environment-sensing and its editing are feasible for every fish to breed naturally and derived from the digital rules in a newer environment of natural fisheries that are being studied for years by the author and being communicated. All we know is that every species has got a certain range of water qualities. In such domain, there may be a sub-domain that every fish species needs a lower to lowest environmental stresses when the species breed naturally. Primarily a minimum Total Dissolved Solids (TDS) prevailing in an Ecology can facilitate the natural breeding of the species. In repeated fisheries experiments for years, the author revealed that all inland species may naturally breed within 165 to as low as possible ppm of Total Dissolved Solids (TDS) of any Ecology waters. A recent hypothesis is that when Mystus gulio is usually grown in the range of 160 to 205 ppm of total TDS, when brought to a mere TDS 100 ppm, species successfully can breed even in off-seasonally or other than usual breeding seasons. The science behind this is that minimum TDS provides minimum optical densities of water-bearing minimum ionic stresses. It can be measured digitally. In recent years authors have also found that fish growth and their fecundity both have got linearly a negative correlation with TDS and CEC applicable for every animal, including fish species. Other reveals are that the yellow river with sands maybe than the grey river with clay in terms of natural breeding of fish species and their fecundities with ionic perspectives.