Fighting

Today it was real droopy and rainy so I was compelled to stay inside. With the weather being as it is I fell asleep in my futon. My dream consisted of me fighting in what looked like a cave filled with light blue, glowing water. Once again from my 1st person prospective. Some creature and myself fighting one another. I would even go as far as to say it looking like Medusa from Greek mythology. I stayed above water apparently walking on top of it. However, this creature tended to delve below the surface. Around the end of the dream I see my sister. Then I awake.