Flotsam and Jetsam in "The Little Mermaid"
I believe the answer is:
eels
'flotsam and jetsam in the little mermaid' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eels that I've seen before include "Slippery types" , "Slippery customers" , "eg Conger" , "Feels small imprisoning water creatures" , "Long, fleshy fish" .)