The effect of replacing dietary fish oil with canola oil on fatty acid composition and expression of desaturase and elongase genes in Jade Tiger hybrid abalone

► Canola oil effects on fatty acids and gene expression in abalone are compared with fish oil supplementation. ► Canola oil supplementation up to 50% achieves the high total n-3 PUFA, EPA and DHA levels as fish oil. ► Δ-6 desaturase and elongase 2 gene expression increases in a graded manner by increasing canola oil levels.