Omega-3 from fish oil better than vegetarian Omega-3?

Question:
Could you tell me whether Omega-3 from the sea is better than from seeds and nuts, in other words vegetarian?

Answer:
Plant based Omega-3 in food is generally comes in the form of alpha-linolenic acid (ALA). ALA has no specific purpose as far as we know.

The body has yet to convert ALA to the active Omega-3 fatty acids EPA and DHA. This conversion is a difficult process. You will often see in scientific studies that supplementation with ALA usually has no effect, while animal Omega-3 fatty acids EPA and DHA are effective.