Dream about a pool full of fish is a message for your love life and the pressure to find someone to spend your life with. You are experiencing doubts in your own decisions and actions. You are pursuing empty and fruitless endeavors. The dream is a warning signal for indecision; you cannot make up your mind about something. Your perspective is skewed and you are not seeing things clearly.
A pool full of fish dream is a premonition for unexpressed hostility which may erupt in violence if not expressed in a controlled manner. You are involved in a scandal. You need to clear out your thoughts and get rid of your old ways and habits. This dream signals your anxieties and fears that he/she won't like you back. You need to simplify your life and get back to the bare basics.
If you dreamt about a pool full of fish:
During the last few months, it could be that you've met some strange people who have greatly influenced your attitude about marriage or partnership. They've been pushing you to get more freedom into your life. If this is indeed the case, you can feel quite sure that they've come under a cosmic influence. That's no reason for you to agree. Freedom or lack of freedom is completely subjective.