Plectranthias yamakawai is a species of fish in the family Serranidae occurring in the western Pacific Ocean.Randall, J.E., 1980. Revision of the fish genus Plectranthias (Serranidae: Anthiinae) with description of 13 new species. Micronesia 16(1):101-187.
Size This species reaches a length of .
Etymology The fish is named in honor of ichthyologist Takeshi Yamakawa (b. 1942), of Kochi University, who was the one who first collected and reported this species.
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