Pisces Key Planet: Neptune Neptune is the God of the Seas. She symbolizes the dissolution of reality, for all Earth arises from the ocean and eventually returns to it. Neptune is represented by the mists, which prevent us from seeing the reality. Instead, we must rely on our own imagination to guide us through the hidden realms. As the main planet for Pisces, Neptune is about the spiritual and the mystical. It's about anything that we cannot see with our five senses.