'Was listening to an interesting article on the nutritional value of fish recently. Apparently fish do not make Omega-3 fatty acids, all the Omega-3 is made by algae in plankton. Sea creatures eat the algae. Some fish eat the algae and some fish eat the creatures that eat the algae. In this way, fish absorb and concentrate omega-3. Apparently you can get vegetarian Omega-3 made directly from algae; you can also get in from
flaxseed oil (also called linseed oil) - perhaps more cost effective.