This could be attributed to the higher fat content of seaweed powder (2.72 ± 0.28%), as compared with the replaced ingredients (Lo ́ pez-Lo ́ pez et al. 2010). Likewise, replacing fish finger ingredients with both U. intestinalis powder and USP significantly improved the protein content (P.05). The higher protein content of Tsp compared with the control is ascribed to the close association of proteinous moieties with the cell wall polysaccharides through covalent bond, since these polymers are part of the seaweed cell wall structure (Robic et al. 2008). In the current study, there was 9% of protein recovery from the USP extraction, which was not eliminated during the alcohol precipitation.