A fish that leaves the water to glide is read as escape and the wish to cross between two worlds — the deep one of feeling and the open air of freedom.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.