Marine animal hunting curtailed after receiving text for you (3,6)

I believe the answer is:

sea urchin

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'marine animal' is the definition.
(thesaurus)

I cannot understand how the remainder of the clue works.

(Other definitions for sea urchin that I've seen before include "Marine animal with globular body" , "Main thing" , "spineless creature" , "marine echinoderm" , "A problem for barefoot dabblers" .)

I've seen this clue in The Guardian.

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