Dyesebel (1973)

Concerns a young mermaid named Dyesebel (Vilma Santos) who lives in an undersea kingdom with other mermaids. They are outcasts-not wanted on Earth, believing their presence is bad luck. But when she falls in love with a human being, she vows to do everything to have two legs and become a part of her earthly love's world…even if it means risking her life. Also stars Romeo Miranda Divina Valencia. (In Tagalog language).

Because this is the only known surviving print of this film, it has several picture glitches in the first ten minutes or so, but is fine afterwards.