Wikipedia
MermaidFX
MermaidFX is a company that creates mermaid tails and other aquatic costumes for television shows, films, commercials and individuals. Their prosthetic mermaid tail rentals have been most widely seen in the Hercules: The Legendary Journeys television series worn by actors Angela Dotchin and Michael Hurst.
The professional costumes made by MermaidFX are used by photographers and other professionals. Some stock photography houses including iStockPhoto, ShutterStock and JupiterMedia Corporation have photos including their costumes. The company also manufactures a line of consumer quality mermaid costumes called "MerTails" and "Siren Tails", mostly used by individuals for personal use.