Abstract
The aim of the study is to investigate the toxicity level and the effects of Ammonia, Formalin, Sodium Benzoate, Sulphite, and Methyl Mercury on the selected species, which frequently enters in to the aquatic environment and renders the potential treat to human beings.The evaluation of toxicity level was done by HPLC, ICP-MS, and Monier-Willams methods by using the FASSAI, AOAC lab manuals and which is under the laboratory condition. The following species are Ayila, Vanjaram, and Nethili. The strongest effects was exerted by Methyl Mercury as 1mg/kg, sodium benzoate as 26.005 mg/kg, sulphite as in the range of 15-25 mg/kg and the presence of ammonia and formalin were analyzed.The preservatives had no significant effect on the changes in mean weight, color, and mean length. The significant effect of the chemicals was only on humans by consuming the huge amount of fish was recognized and some effects having proper treatment and some of the effects are not having the proper treatment.