Guinea Pig: Mermaid in the Manhole (1988) is a Horror, Romance film that follows an artist dealing with the grief of his wife leaving him finds solace in painting the squalor of the sewer. He discovers a trapped mermaid, whom he brings home to heal. Her condition worsens, and she asks the artist to paint her before she dies. Guinea Pig: Mermaid in the Manhole is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 5.4 out of 10 from 68 votes. Fans of horror movies may also want to explore similar titles below.