To not become too repeat-image-offensive, I shall respond to Mermaid Merin in text form!

Merin, even with its deteriorated quality, that tail still looks quite fine. The dorsal in particular reminds me of those fighting fish one sees packaged individually and makes you look very much like an authentic fish in terms of movement, too.

Also, that choice of musical accompaniment took me back to the halcyon days of 1999! Ah, S Club 7: Simon Fuller's vengeance upon the Spice Girls in the days before American Idol....