Gephyroberyx is a genus of fishes in the slimehead family.
Species Once, three species were placed in this genus, but Gephyroberyx philippinus is now considered to be a synonym of G. darwinii.Froese, R. and D. Pauly, Eds. Gephyroberyx philippinus. FishBase. 2013.Kim, B.J., Go, Y.B., and Imamura, H. (2004). First record of the Trachichthyid Fish, Gephyroberyx darwinii (Teleostei: Beryciformes) from Korea. Korean J. Ichthyol. 16(1): 9-12. Based on broadly overlapping morphological features, G. japonicus should also be regarded a synonym of G. darwinii, but both are recognized as valid species by FishBase:
Gephyroberyx darwinii (J. Y. Johnson, 1866) (Darwin's slimehead) Gephyroberyx japonicus (Döderlein, 1883) (big roughy)
References