Natural Factors Whole Earth & Sea Marine DHA - A sustainable algal oil source of DHA that supports eye health and brain function. Extracted from specially selected Schizochytrium microalgae, this omega-3 oil has no fishy smell or aftertaste and is an excellent vegan alternative to fish oil supplements. Most people think that fish are the original source of the omega-3 fatty acids EPA and DHA, but it's actually the algae they consume that contain these important omega-3s. Marine DHA is a sustainable plant source of DHA.