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Cyclothone microdon1.jpg
Veiled anglemouth (C. microdon)
Cyclothone pallida.jpg
Tan bristlemouth (C. pallida)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Stomiiformes
Family: Gonostomatidae
Genus: Cyclothone
Goode & T. H. Bean, 1883

Cyclothone is a genus of bioluminescent bristlemouths which typically grow to around 3 inches (though some species are known to be larger). They are most commonly found at depths exceeding 1000 feet.[1]

The genus is believed to be more abundant than any other vertebrate genus on Earth, numbering up to a quadrillion individuals.[2][3]


There are currently 13 recognized extant[4] and one extinct[5] species in this genus:


  1. ^ Proujan. C., (1979), SECRETS OF THE SEA, 2nd ed., London: Reader's Digest Association Limited pg.60
  2. ^ Broad, William J. (June 29, 2015). "An Ocean Mystery in the Trillions". The New York Times. Retrieved August 2015.  Check date values in: |accessdate= (help)
  3. ^ Castro, Peter; Huber, Michael E (2016). Marine Biology (10th ed.). New York, NY: McGraw-Hill. p. 369. ISBN 9780078023064. 
  4. ^ Froese, Rainer, and Daniel Pauly, eds. (2012). Species of Cyclothone in FishBase. February 2012 version.
  5. ^ a b Nazarkin, M. V. (2015) "Fossil bristlemouth Cyclothone mukhachevae sp. nov.(Stomiiformes: Gonostomatidae) from the Neogene of western Sakhalin, Russia". Paleontological Journal, 49 (2): 162–175. doi:10.1134/S0031030115020045