The aim of the present study was to evaluate the effect of adding three sources of oils in the diets on the performance of Siganus rivulatus fingerlings cultured in tanks. The fingerlings were caught from the marine coastal waters during May 2016, subjected to adaptation period of seven days, and then distributed in four experiment ponds with 30 individual/pond .The fingerlings were fed on a diet containing 30% plant protein, 8% of three different oils; fish oil, sunflower oil, and linseed oil were added in three tanks, whereas the fourth one considered as control had no oil addition. results showed that the fingerlings fed on the linseed oil diet, had the best final weight and the best FCR (Feed Conversion Ratio) (1.76) followed by fish oil diet with FCR =2.36. The results also showed no significant difference when sunflower oil diet and control were compared with FCR= 3.29, 2.50 respectively. Fingerlings showed a good response to the new conditions after about a week of rearing process start and had a grey color. In addition, the survival rate was (96%).