This is an interesting question because I had a similar experience. I had dreams for months (every night) about eels. And usually, the eels were on dry ground and I would have to step on top of them to move. I did some research and the eels (which are a big fear of mine) were somewhat symbolic of obstacles in my life. I was afraid of doing what I wanted because of uncontrollable circumstances. So, I concluded that I was afraid of the future and I needed to move forward despite all of the things I was afraid of. After I came to this conclusion, my dreams stopped.
I don't know if this is similar to your story, but I hope it gives some insight.