yes, salmon fish is good
but be careful, you should not give the salmon everyday or too oftenly to baby! its contain a lot of oil, that will give problem for digest system of baby.
i learn this experience, since some weeks ago, my son is very sick, vomiting and diarrhea (some virus
in the digest system), he cannot eat at all, only like to eat watering congee! so i get the idea, to make him salmon congee so i think can give him more vitamin that he lose since few days
but end up, its give more problem to him, he has such a watering poo after that.
and then i read a lot of article, fish congee is good, but should not always give to the baby or children, since its contain too much oil.
try to give some minced meat, such as minced chicken, beef and pork, and sometimes put cooked vegetable also to congee, its better for them