No. There is no scientific evidence to support the existence of mermaids.
Why not?
There are several reasons why mermaids are not likely to be real.
* Lack of fossil evidence. If mermaids were real, we would expect to find their fossils in the ocean. However, no mermaid fossils have ever been found.
* Physiological impossibility. Mermaids would need to be able to breathe underwater, which would require them to have gills. However, no known mammals have gills.
* Lack of sightings. Mermaids have been reported in folklore and literature for centuries, but there have never been any confirmed sightings of mermaids.
Conclusion
The evidence suggests that mermaids are not real. They are likely just creatures of myth and imagination.