Semicossyphus is a genus of fish in the Labridae family. Member species are found around Japan, China, the Koreas (Semicossyphus reticulatus) as well as off the coast of California and Baja California (Semicossyphus pulcher). Their natural habitats are open seas, shallow seas, coral reefs and subtidal aquatic beds.

It presently contains the following two species:

• Asian sheepshead wrasse (Semicossyphus reticulatus)
• California sheephead (Semicossyphus pulcher)

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