Guiyu may refer to:
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Guiyu oneiros
''Guiyu oneiros'' is the earliest articulated bony fish discovered. The generic name ''Guiyu'' is a transliteration of the Mandarin 鬼魚 ''guǐyú'' "ghost fish" and the specific name ''oneiros'' is from Greek ὄνειρος "dream". Fossils ...
'' (鬼鱼), extinct bony fish
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Guiyu (town)
Guiyu () is a Towns of China, town created from an agglomerate of four adjoined villages totalling 150,000 people in the Chaoyang District, Shantou, Chaoyang district of Guangdong province in China. Situated on the South China Sea coast, Guiyu is ...
(贵屿镇), town in Chaoyang District, Shantou, Guangdong, China
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