Is there a difference between omega-3 from seeds (e.g. flaxseeds) and omega-3 from fish?

Flax is a good source of fibre but it is not a direct source of Omega-3 EPA and DHA. Studies show that humans only convert 15% of ALA (omega-3 source found in seeds) to EPA and it may not convert to DHA at all in many people. Fish oil is a direct source of both EPA and DHA. Eskimo-3 contains 750mg EPA and 500mg DHA in each teaspoon.