doctorfish

 

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doctorfish

Wikipedia

 

From doctor +‎ fish.

doctorfish (plural doctorfishes or doctorfish)

1. Either of the fish Garra rufa and Cyprinion macrostomus, which feed on dead skin while leaving the healthy skin intact.
   • 2008 January 15, Elisabeth Rosenthal, “Europe’s Appetite for Seafood Propels Illegal Trade”, in New York Times‎^[1]:

     Walking at the Brixton market among the parrotfish, doctorfish and butterfish, Effa Edusie is surrounded by pieces of her childhood in Ghana.