NYBC recently added to its catalog this omega-3 fatty acid supplement which is derived from a vegetable source (algae) rather than from fish:
DHA Omega-3 (Natrol) Each bottle, 30 softgels. Each softgel, 100 mg of DHA derived from algae (no fish/vegetarian). Suitable for vegetarians who wish to avoid fish/menhaden sources. This product recently passed a consumerlabs test as the only example of a non-fish-based omega-3 fatty acid supplement. Suggested use is 1 softgel with a meal or as directed.
See other entries under Omega-3 fatty acids on this Blog for evidence and recommendations for use.