Thin sea or freshwater fish (3)
I believe the answer is:
eel
(Other definitions for eel that I've seen before include "Slithery fish" , "Long thin fish" , "Conger, e.g." , "Teleost fish" , "A sea snake" .)
I believe the answer is:
eel
(Other definitions for eel that I've seen before include "Slithery fish" , "Long thin fish" , "Conger, e.g." , "Teleost fish" , "A sea snake" .)