Skip the fish oil. The quality and conversion from straight algae is better and more efficient. Why go through the fish to get the be edits if what he’s eating? Cut out the middle fish and go straight to the source. We aren’t carnivores. We’re not even omnivores or herbivores. We are frugivores. Google image search for “comparative anatomy carnivore frugivore” and it’ll be instantly clear: we were not designed lacking something that we must get from fish.