Teleostei (teleosts) >
Tetraodontiformes (Puffers and filefishes) >
Monacanthidae (Filefishes)
Etymology: Aluterus: Name from Greek meaning not free or detached, referring to the pelvis that does not form a spiny project (as it does in triggerfish) (R. Chandler, pers. Comm. 10/2014).
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; depth range 3 - 120 m (Ref. 36484), usually 3 - 20 m (Ref. 40849). Subtropical; 46°N - 30°S, 180°W - 180°E
Circumtropical.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 110 cm TL male/unsexed; (Ref. 9710); common length : 55.0 cm TL male/unsexed; (Ref. 5450); max. published weight: 2.5 kg (Ref. 26340)
Dorsal spines (total): 2; Dorsal soft rays (total): 43 - 50; Anal spines: 0; Anal soft rays: 46 - 52. Snout concave (Ref. 1602); olive brown to grey in color, juveniles may be yellowish brown with dark spots (Ref. 4421). Elongate, strongly compressed filefish; tan with blue lines and spots. Caudal fin rounded (Ref. 26938) and long (Ref. 13442). Gill opening oblique, pelvic terminus rudimentary or absent; body and head with scattered small black spots (Ref. 13442).
Body shape (shape guide): short and / or deep.
Inhabit lagoon and seaward reefs (Ref. 9710). Occasionally are seen under floating objects (Ref. 1602). Juveniles may travel with weed rafts in open ocean for a long time and reaching a large size. Adults are usually seen along deep coastal slopes or outer reef drop-offs in about 20 meters depth (Ref. 48637). Benthopelagic (Ref. 58302). Feed on algae, seagrass, hydrozoans, gorgonians, colonial anemones, and tunicates. Caught at the surface using a hand net (Ref. 26165).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Hutchins, J.B., 1986. Monacanthidae. p. 882-887. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref. 4421)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Reports of ciguatera poisoning (Ref. 4690)
Human uses
Fisheries: commercial; gamefish: yes; aquarium: commercial
Tools
Special reports
Download XML
Internet sources