I dreamed that carp was caught and eaten by a cat.

To put it bluntly, this is not a good dream. Carp is a symbol of good luck. Being eaten by a cat means that good luck is gone. Dream of your aunt, either your aunt refers to the cat, or they take away your good luck, or your aunt has no good luck. This is just my guess. I know what you want to hear, but I want to express my opinion. Whether you adopt or not, I hope you can live happily.