Dreams communicate through symbols. In this dream, the dog represents something important to the dreamer that shares the qualities of a dog - faithfulness and loyalty, or perhaps dependency. The action of saving the dog is also a metaphor, suggesting that the dreamer needs to pull themselves or someone else out of trouble. In this dream, the water could represent the idea of "getting in too deep." See the attached web site for more information on how symbols are used in dreams.

it just means you saved a dog from the water,and that your a hero ?

I have a dream*

The symbols are the dream, the land, the devil, and the elder sister

You just had a bad dream.

it symbols protection