Little Mermaid Tube dress

this has been my bday dress ever since my sister sent it to me from far away. it has no brand and i always guessed it was an upcycled sheet or something for the bottom but i could be wrong. i used to often wear it with a wide belt to give me more of a waistline. red poke a dot stretchy upper, with short but kinda flowy ariel, flounder and sebastian design bottom with light purple stripes.