“…Tetraselmis tetrathele , which belong to the Chlorophyta phylum, is a green marine microalga widely used in aquaculture as feeds for marine lives, such as molluscs (Blanchard et al, 2008 ; Lu et al, 2017 ), crustacean larvae (Magnotti et al, 2016 ) and as a probiotic in fish (Grotkjær et al, 2016 ; Dittmann et al, 2020 ). The wide application of T. tetrathele could be attributed to the presence of numerous bioactive, biochemical compounds, such as polyunsaturated fatty acids (PUFA), polysaccharides, lipids, protein, enzymes and carotenoids in the microalgae cells (Tsai et al, 2016 ; Di Lena et al, 2019 ; Farahin et al, 2019 ; Schüler et al, 2020 ). From the culturing perspective, Chlorophyceae was noted to exhibit significant tolerance to high ammonium nitrogen concentration compared to other algae phylum, such as Cyanophyceae, Diatomophyceae, Dinophyceae, Prymnesiophyceae, and Raphidophyceae (Collos and Harrison, 2014 ).…”