Take shells from water, anxious, and see fish (6)

I believe the answer is:

wrasse

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'fish' is the definition.
(wrasse is a kind of fish)

I don't understand the rest of the clue.

(Other definitions for wrasse that I've seen before include "Swimmer" , "Type of fish" , "Swears about the tropical marine fish with strong teeth" , "Brightly-coloured fish" , "Bony fish" .)

I've seen this clue in The Telegraph.

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