It might be a fluke (4)
I believe the answer is:
fish
(Other definitions for fish that I've seen before include "Aquatic vertebrate" , "Aquatic animal" , "Aquatic creature(s)" , "Customer" , "Ruff" .)
I believe the answer is:
fish
(Other definitions for fish that I've seen before include "Aquatic vertebrate" , "Aquatic animal" , "Aquatic creature(s)" , "Customer" , "Ruff" .)