What is the difference between these two sentences?
Japanese Language Stack Exchange is a question and answer site for students, teachers, and linguists wanting to discuss the finer points of the Japanese language. It only takes a minute to sign up.Sign up to join this community
It's not a sentence, there is no predicate. It's a noun phrase meaning "a person who likes fish", or if the general subject where this expression appeared is a comparison between different animal species (including human) "fish-liking human(kind)".
This on the other hand is a full sentence. "Human(kind) like fish".