Johnrandallia nigrirostris
Barberfish
Collection Details
Specimens
Photos
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Records
Taxonomic Hierarchy
Actinopterygii (Ray-finned Fishes)
Perciformes (Perciformes, Also Called the Acanthopteri)
Chaetodontidae (Butterflyfishes)
Johnrandallia
Johnrandallia nigrirostris (Barberfish)
Description
This species account was compiled from
FishBase (Froese, R. and D. Pauly. Editors. 2025. FishBase. World Wide Web electronic publication. www.fishbase.org, version 04/2025.)
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Characters
Body shape: short and / or deep. Body deep, compressed, and disk-shaped; dorsal profile of head steep and concave; snout pronounced; teeth very small and se in a comb-like band; base of pelvic spine with an axillary process; lateral line complete, extending over caudal peduncle; body yellowish; snout with a dark stain; eye bordered with black; posterior edge of operculum, base of pectoral fins, nape, and dorsal border (at base of dorsal fin) black (Ref. 55763). Striking features: none.
Distribution
Eastern Pacific: Gulf of California to Panama, including the Cocos, Malpelo and Galapagos Islands.
Habitat Associations
Marine. reef-associated. depth range 6-40 m. Found in: coral reefs.
Biology
Often in large schools (Ref. 5227) over coral and rocky reefs (Ref. 9286). Feed on algae, gastropods, and small crustaceans (Ref. 9286). Pick parasites from larger fishes like Paranthias colonus and Mulloides dentatus (Ref. 28023). Oviparous (Ref. 205). Form pairs during breeding (Ref. 205).
Max length: 20.0 cm TL; common length: 14.0 cm TL.
Reproductive mode: dioecism; fertilization: external; nonguarders. Form pairs during breeding (Ref. 205).
IUCN Red List Status: Least Concern (LC), assessed 2009-10-06. Resilience: High (Preliminary K or Fecundity.).
Commercial or Environmental Importance
Fisheries: commercial; aquarium: commercial.
References
Breder, C.M. and D.E. Rosen (1966) Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. 941 p.
Burgess, W.E. (1978) Butterflyfishes of the world. A monograph of the Family Chaetodontidae. T.F.H. Publications, Neptune City, New Jersey.
Schneider, M. (1995) Chaetodontidae. Peces mariposa. p. 1000-1003. In W. Fischer, F. Krupp, W. Schneider, C. Sommer, K.E. Carpenter and V. Niem (eds.) Guia FAO para Identification de Especies para lo Fines de la Pesca. Pacifico Centro-Oriental. 3 Vols. FAO, Rome.
De la Cruz Agüero, J., M. Arellano Martínez, V.M. Cota Gómez and G. de la Cruz-Agüero (1997) Catalogo de los peces marinos de Baja California Sur. IPN-CICIMAR, La Paz, Mexico. P. 346.
Jiménez Prado, P. and P. Béarez (2004) Peces Marinos del Ecuador continental. Tomo 2: Guía de Especies / Marine fishes of continental Ecuador. Volume 2: Species Guide. SIMBIOE/NAZCA/IFEA.
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