There are stories of half human, half fish beings all over the world. Where does this myth come from? Is the existence of mermaids possible?

Script: Tonatiuh Moreno
Illustrations: Sandra Cárdenas
Animation: Alejandra Espinoza, Tonatiuh Moreno
Voice: Javier Lacroix
Music: Miguel Solís, Mary Camarena y Jorge Verdín

FOR RESEARCH:
General information: https://es.wikipedia.org/wiki/Sirena
Facts and myths about mermaids: https://www.livescience.com/39882mer...
About manatees and dugongs: https://news.nationalgeographic.com/2...
Reasons why mermaids couldn't exist: http://www.deepseanews.com/2013/10/fi...

Additional music:
Weirder Stuff, Geographer
Mermaid by Kevin MacLeod is authorized by the license of Creative Commons Attribution (https://creativecommons.org/licenses/...)
Source: http://incompetech.com/'>http://incompetech.com/'>http://incompetech.com/'>http://incompetech.com/music/royalty...
Artist: http://incompetech.com/'>http://incompetech.com/'>http://incompetech.com/'>http://incompetech.com/
Ghost Female Singing, by MadamVicious: https://freesound.org/people/MadamVic...
Pajarito, son Jarocho byLenguaverde: https://freesound.org/people/Lenguave...
Ishikari Lore by Kevin MacLeod is authorized by the license of Creative Commons Attribution (https://creativecommons.org/licenses/...)
Source: http://incompetech.com/'>http://incompetech.com/'>http://incompetech.com/'>http://incompetech.com/music/royalty...
Artist: http://incompetech.com/'>http://incompetech.com/'>http://incompetech.com/'>http://incompetech.com/
Learning is Fun, Doug Maxwell/Media Right Productions
Folk Round by Kevin MacLeod is authorized by the license of Creative Commons Attribution (https://creativecommons.org/licenses/...)
Source: http://incompetech.com/'>http://incompetech.com/'>http://incompetech.com/'>http://incompetech.com/music/royalty...
Artist: http://incompetech.com/'>http://incompetech.com/'>http://incompetech.com/'>http://incompetech.com/