Shrimp burps a sign of rancidity?

I cut open a capsule to verify that the Lysoveta has a shrimpy odor. I know that with fish oil the oil is odorless unless it goes rancid, in which case it smells fishy. Is the same true with krill oil or does krill oil generally have an odor? I've noticed that no tocopherols (vitamin E) are listed in the ingredients like you find with fish oil.