Rainbow trout (Oncorhynchus mykiss) eggs are a rich source of polyunsaturated fatty acids (PUFAs), with levels exceeding those found in fish meat, and are also a notable source of bioactive omega-3 fatty acids, primarily eicosapentaenoic acid (EPA)and docosahexaenoic acid (DHA). However, despite their nutritional advantages, their in vivo immunomodulatory properties remain poorly understood. Th...