GreenOMEGA 3 is ideal for vegans and vegetarians who want an Omega 3 supplement with all of the benefits of fish oil, but without the fish and the related sustainability issue of using a fish source. While most people know fish are a rich source of Omega 3 (DHA and EPA), many don’t know that the fish actual get these essential fatty acids from the marine microalgae (Schizochytrium sp.) they eat in their natural environment.