Dichichthys is a genus of sharks which is the only genus in the monotypic family Dichichthyidae, the bristle sharks. These sharks are found in the Western Pacific Ocean. Until recently, scientists believed these 5 species were part of the genus Parmaturus, until morphological testing confirmed its placement in its own family. Supraorbital crests on the chondrocranium also distinguish Dichichthys from other catshark genera/families.
Species Dichichthys contains the following five recognised valid species: Dichichthys albimarginatus (Séret & Last, 2007) (Whitetip bristle shark) Dichichthys bigus (Séret & Last, 2007) (Beige bristle shark) Dichichthys melanobranchus (W. L. Chan, 1966) (Blackgill catshark) Dichichthys nigripalatum (Fahmi & Ebert, 2018) (Indonesian filetail catshark) Dichichthys satoi (White, Stewart, O'Neill & Naylor, 2024) (Roughback bristle shark)
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