Córki Dancingu

Córki dancingu is Polish musical released in 2015, featuring couple of mermaid-like characters.

Plot
Two mermaids hear singing on the beach at night, and ask the men to take them to shore. They join the small group called Córki Dancingu on the land and hang out in the backroom of a nightclub, where they perform. The owner of the nightclub finds them there, and he's let on into the secret of the mermaids. The owner then recruits the girls into the stage act were they are backup singers and strippers, and exploits their unique appearance to get bigger crowds. Srebrna falls in love with a young bass player, Mietek. Zlota longs for the sea and the thrill of the kill. She goes out on the town, and finds a man to kills and eat. On their next performance, Zlota gets noticed by a police officer, who invites Zlota to her home to spend a night. The next day, Córki Dancingu, and the mermaids watch some television, when the news of a gruesome murder-scene is shown. The group realizes that the mermaids are to blame, and Perkusista knocks them out. The group then wrap them in carpets and throw off the bridge. They can't take the guilt, and overdose that night, fortunately they are found and saved. To the surprise of the group, Srebrna and Zlota return. Srebrna plans on getting real legs to be with Mietek, even though a fiend warned her earlier that doing so meant her losing her voice. Thinking it be superstition, she goes through with it, swapping her tail for legs with another girl, and looses her voice. Mietek however falls in love with another woman, and they get married. The fiend and Zlota both tell Srebrna to eat Mietek, before the night is over, or she will turn into seafoam. Srebrna decides not to do so and turns to seafoam between Mietek arms. Zlota is distraught by it, kills Mietek, and escapes to the sea.

Links
Córki Dancingu page on IMDB