Mermaid Lucia: https://www.mermaidlucia.com/
Moonsong Magic: https://www.moonsongmagic.com/
Mertailor Patent: https://patents.google.com/patent/US10350457B2/en?q=flowing+fin+system+and+tail+system&inventor=Eric+Jonathon+Ducharme
As an update to this original post I would like to make you all aware that I no longer support Mermaid Lucia after the questionable actions taken in regards to the Finfolk LED tail that they blatantly ripped off. Mermaid Lucia blocked me on Instagram after I made my opinions on this matter known.
I would also like to add that I do not believe them to be the manufacturer of this monofin but merely a distributor.