The good news is that the fish oil and omega-3 industry is looking to proactively tackle this issue.
Source: Summit to explore sustainable omega-3 alternatives
Personally, I like krill oil for the following reasons:
- bioavailability and therapeutic benefits are far superior to fish oils according to studies
- the phospholipids attached to the omega-3 fatty acids have their own unique benefits
- naturally occuring astaxanthin
- and of course, being the largest biomass in the ocean (and perhaps the planet), sustainability is a non-issue