The catfish, a bottom-dweller with whiskers, is read as hidden feelings and instincts working in the dark. It can also stand for deception, someone not being who they seem.
Does the traditional reading fit your dream, or did it mean something else to you?
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.