The cherubfish (Centropyge argi), also known as the pygmy angelfish, is a species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the western Atlantic Ocean.
The cherubfish has an oval, deep and laterally compressed body with a short, blunt snout and a small mouth. There is a long, robust spine at the angle of the preoperculum, which has its vertical edge being serrated. The body is deep blue in colour with the head and chest being orange-yellow with a thin blue eye ring and a small dark blue botch to the rear of the mouth. The pectoral fins are pale yellowish while the other fins are dark blue with light blue margins. The dorsal fin contains 14-15 spines and 15-16 soft rays while the anal fin has 3 spines and 17 soft rays. This species attains a maximum total length of 8 centimetres (3.1 in).
The cherubfish is found in the western Atlantic Ocean. It occurs off Bermuda, and from North Carolina through the Caribbean Sea and Gulf of Mexico to the Caribbean coast of South America, as far east as French Guiana.
Habitat and biology
The cherubfish occurs at depths between 5 and 18 metres (16 and 59 ft), typically below 30 metres (98 ft). Its usual habitat is coral rubble where it feeds on algae and small benthic invertebrates. It retreats into cavities when alarmed. It lives in small groups of around 10 fish, usually a single male and a few females and juveniles.
The cherubfish was first formally described in 1951 by Loren Paul Woods and Robert H. Kanazawa with the type locality given as the Argus Bank near Bermuda. In some classifications it is placed in the subgenus Xiphipops.The specific name refers to the type locality.
The cherubfish is one of the most popular species of marine angelfish in aquaria. 
- Pyle, R.; Rocha, L.A.; Craig, M.T. (2010). "Centropyge argi". IUCN Red List of Threatened Species. 2010: e.T165837A6145156. doi:10.2305/IUCN.UK.2010-4.RLTS.T165837A6145156.en. Retrieved 20 November 2021.
- "Species: Centropyge argi, the Cherubfish". Shorefishes of the Greater Caribbean online information. Smithsonian Tropical Research Institute. Retrieved 16 January 2021.
- Froese, Rainer; Pauly, Daniel (eds.) (2019). "Centropyge argi" in FishBase. December 2019 version.
- "Centropyge argi". Saltcorner!. Bob Goemans. 2012. Retrieved 16 January 2021.
- Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Centropyge". Catalog of Fishes. California Academy of Sciences. Retrieved 16 January 2021.
- Christopher Scharpf & Kenneth J. Lazara (21 July 2020). "Order ACANTHURIFORMES (part 1): Families LOBOTIDAE, POMACANTHIDAE, DREPANEIDAE and CHAETODONTIDAE". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 16 January 2021.
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