I really, really hate fish with a lot of small bones - I know it's edible, but it's just disgusting to me, and the feeling of it getting stuck on my gums or throat... UGHHH (sprats, anyone? Haha)
However I want to get my Omega-3s (from eating fish, not another source, for medical reasons). I am also very low on the budget, so I would strongly prefer something that doesn't cost as much as for example salmon (which is available without any bones). I would be baking the fish or making some kind of fish soup (not frying it), and therefore I am only interested in raw or frozen fish (not canned, stored in oil or pickled).
Also, it doesn't have to be fish, but it also cannot be seaplants. And again, I prefer something on the cheaper side (so no crabs or anything). :-)
If it matters, I live in Europe, so most things would be imported (besides, lake fish often are really high in Mercury).