movie about a mermaid drinking holy water to get legs

A paralyzed girl finds difficulty living a normal life, so she participates in a ritual to metamorphize into a mermaid to replace her useless lower half.

Mermaid horror movie.

Two carnies (Sewell and Gugino) abduct a mermaid in Ireland, circa 1900, and decide to transport her to America. As their ship loses its way and heads towards the mythical Forbidden Islands, the mermaid begins to display its deadly side.

An overprotective father and his feisty 12-year-old daughter, who take in a mysterious young woman who washes ashore on the bank of a local river. The father-daughter duo’s lives are forever changed by the arrival of this stranger and by the ruthless drug lord who will stop at nothing to possess her.

An evil Mermaid falls in love with Marina's fiancé Roman and aims to keep him away from Marina in her Kingdom of Death under water. The Mermaid is a young woman who drowned a few centuries ago. Marina only has one week to overcome her fear of the dark water, to remain human in the deathly fight with the monsters and not to become one herself.

A fishing crew lands the ultimate catch: A mermaid. Captive and sold to the highest bidder, she is left in the care of a boy who takes it upon himself to return her to sea. Throughout her journey, we are exposed to the best and worst of the human condition.