在海滨小镇度假时，约翰尼对一个年轻的深色头发的女人产生了兴趣。他们见面后，他得知她在当地的狂欢节上扮演美人鱼。在奇怪的事情发生后，约翰尼开始相信她可能真的是一条在满月周期中习惯性地杀人的美人鱼。
Dennis Hopper
Johnny Drake
Linda Lawson
Mora
Gavin Muir
Capt. Samuel Murdock
Luana Anders
Ellen Sands
Marjorie Eaton
Madame Romanovitch
Tom Dillon
Merry-Go-Round Operator
H.E. West
Lt. Henderson
Marjorie Cameron
Water Witch
Chaino
Head Bongo Player
Kirby Allan
Bongo player
Barbette
Man Talking at Bar
Danny Best
Teen on Midway
James Boscon
Teen on Midway Gawking at Mermaid
Richard Boscon
Teen on Midway with Glasses
