Where dream interpretation is concerned, dead fish are generally thought to symbolise loss or disappointment.
This loss or disappointment is usually financial or influential in nature; for example, if you dream that you find a dead fish in your car, this could symbolise your concern that your car was a bad investment and is costing you more money that you'd have liked.
What About Dead Fish In A Fish Tank?
Fish tanks and fish bowls are thought to symbolise a container of emotions, with the fish inside representing the unconscious mind. Consequently, if the fish inside are dead, this could represent the end of one spiritual or emotional stage in life, and the dawning of a new one.
How About Dreams Of Cooked Fish?
If you dream you're cooking fish, this could mean that you're combining new wisdom with old thoughts and ideas.
Alternatively, it could be a sign that you went to bed hungry!
It's important to remember that dream interpretation is not a science; a dream about dead fish might not actually mean anything symbolic at all!