[IamBenT]

Was the fish dead or alive?? If dead, you may be dealing with some kind of disappointment, such as wealth, an idea, or perhaps infertility.

Since I assume this was a large fish, it may mean you are bringing up feelings from your unconscious that are too big for you too handle, and it may be a scary time for you.

Was the fish swimming? This may mean you are pregnant

It all basically comes up to things that are hidden in your mind are now coming up out into your waking life. good luck