Question: When Dr. Cornbluth first sees the mermaid under water and unsuccessfully tries to take her picture, how come he has an oxygen tank AND an air hose coming from the boat topside? I thought it may be a mistake but I am not a scuba diver so I though I would ask.
Chosen answer: Whilst it may be a tad unusual, each system serves as a back-up for the other.
Answer: The sea hag gives Madison a set of instructions she has to carry out, and tells her that she can only survive out of the ocean for six days. She also tells her she has to wet her tail every day, which is why Madison is seen in the bathtub.
raywest ★
That's why she took a bath that night and got her legs wet turning them into fins.