Can dietary Dictyota dichotoma powder affect performance, serum, and mucus immune parameters, and antioxidant defense in Zebrafish (Danio rerio)?

The present study was performed to study possible effects of Dictyota dichotoma which is a brown macroalgae on whole body extract (WBE) and skin mucus immune parameters, antioxidant enzyme activities as well as expression of growth, immune, and antioxidant related genes in zebrafish (Danio rerio). Zebrafish with an average weight of 0.3 ± 0.08 g were supplied and stocked in 12 aquariums. They were fed with different levels (0 %, 0.25 %, 0.5 %, and 1 %) of D. dichotoma powder for eight weeks. At the end of the trial, results revealed skin mucus immune parameters in fish treated with 1 % D. dichotoma were remarkably higher than control (P