No, krill oil and fish oil are different sources of omega-3 fatty acids, each with unique characteristics. Krill oil is derived from tiny crustaceans called krill, while fish oil is extracted from fatty fish like salmon, mackerel, and sardines. One key difference is in their omega-3 delivery; krill oil contains omega-3s in a phospholipid form, which may enhance absorption, whereas fish oil provides them in a triglyceride or ethyl ester form. Additionally, krill oil naturally contains astaxanthin, a powerful antioxidant, giving it a reddish hue and potentially offering added health benefits. Both are effective sources of omega-3s, but their composition and bioavailability set them apart.