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Grey gurnard
''Eutrigla gurnardus'', the grey gurnard, is a species of searobin native to the eastern Atlantic Ocean, the Mediterranean Sea and the Black Sea. This fish can be found at depths of from though it is not normally found below . This species grows to a length of TL though usually reaching up to TL. This species is the only known member of its genus.
In Ireland, the fish has been called the cuckoo fish, knoud or noud..
==Behaviour==
As other sea robins, grey gurnards produce sounds. Sound production in this species is often associated with competition for food. Small individuals produce more sounds than larger ones, and emit more "grunts" than "knocks", probably because they more often compete for food by contest tactics whereas larger specimens predominantly scramble for food.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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