The situation is that I've expressed that I like Sushi, and then want to proceed and explain why that is, describing sushi as delicious and healthy. Something along the lines of:
Now I don't think ヘルシー or 元気 are probably the right choices here. It is also, that the fish itself is not healthy (it's usually just pretty dead when eating it), but it's good for the one eating the fish, that will get the health benefits.
This might be a trivial translation, but I'd be interested to see how I could find the correct answer myself, as a dictionary search on jisho showed me interesting new vocabulary, but not quite what I was looking for.