OP has been updated. I kept the word "prominence(s)" as I feel it is better than the word "protrusion" in this case. The reason is that when I think of a protrusion, I think of an object jutting out of something (like bone protruding from the skin; sorry for the graphic description).
I also changed "protuberance(s)" to "fins", based on Ray Joker's suggestion. Thank you!
I also changed "protuberance(s)" to "fins", based on Ray Joker's suggestion. Thank you!