Grey knifefish

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Grey knifefish
Bathystethus cultratus (Grey knifefish).gif
Drawing by Dr Tony Ayling
Not evaluated (IUCN 3.1)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Kyphosidae
Genus: Bathystethus
Species: B. cultratus
Binomial name
Bathystethus cultratus
(Bloch & J. G. Schneider, 1801)
  • Cichla cultrata Bloch & J. G. Schneider, 1801
  • Sciaena cultrata J. R. Forster, 1801 (ambiguous)
  • Platystethus guentheri J. D. Ogilby, 1889

The grey knifefish, Bathystethus cultratus, is a species of sea chub native to the Pacific Ocean from Australia to New Zealand and the Kermadec Islands. This species is a plankton eater which swims constantly within a few meters of the surface of the ocean. This species can reach a length of 30 cm (12 in).[1]


  1. ^ Froese, Rainer and Pauly, Daniel, eds. (2013). "Bathystethus cultratus" in FishBase. August 2013 version.