Do you think that there is a possibility that mermaids could be real? As in, could we ever develope gills? is there a

Question: Do you think that there is a possibility that mermaids could be real? As in, could we ever develope gills? is there a possiblity considering we all originally started out as fish?
- Keywords:
  evolution,
  existence,
  fish,
  gills,
  mermaid
Asked by 10cbee to Ed, Hayley, Jason, Nathan, Sophie on 19 Mar 2013.
- Sophie Holles answered on 19 Mar 2013:
  
  Mermaids real? No.. how would they reproduce?
  
  Us develop gills? Well perhaps it could happen.. but it would take millions of years and we would no longer be the same species. And its pretty unlikely.
  
  All animals that have a backbone have evolved from an ancestor that was a fish. So that includes us!

Question: Do you think that there is a possibility that mermaids could be real? As in, could we ever develope gills? is there a possiblity considering we all originally started out as fish?