HUMANS AND ANIMALS FIGHTING...???

I had this dream months ago, but I remember that at the bottom of the sea there was a very large castle, where humans lived there. And then there was another castle also about the same size, where mermaids and mermen and various sea animals lived there. From one moment to the next they went to war. But the marine animals were much stronger, so the castle began to collapse, and the humans decided to flee, but I was trapped and it was impossible to escape because in most places there were marine animals and newts looking for any remains. some more human. (Mermaids went out to look for those who escaped), Suddenly a marine animal helps me and takes me to a shelter, I stayed there for a while until the same animal suddenly opens the door saying that we had to flee, help because they already found out that he was there and that he helped me. So I ran away with him and we left the castle which collapsed even more.

And that's it because after that I woke up