Actinopteri (ray-finned fishes) > Acanthuriformes
(Surgeonfishes) > Chaetodontidae
Etymology: Heniochus: Greek, enioi, -ai, -a = sometimes, some + Greek, oche = food (Ref. 45335). More on author: Linnaeus.
Environment: milieu / climate zone / depth range / distribution range
Marine; brackish; reef-associated; depth range 2 - 178 m (Ref. 86942), usually 15 - 75 m (Ref. 9710). Tropical; 30°N - 35°S
Indo-Pacific: East Africa and Persian Gulf to the Society Islands, north to southern Japan, south to Lord Howe Island. Throughout Micronesia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 25.0 cm TL male/unsexed; (Ref. 5372); common length : 15.0 cm TL male/unsexed; (Ref. 5450)
Inhabit deep, protected lagoons and channels, and the deeper parts of outer reef slopes. Juveniles are often solitary while adults occur in pairs (Ref. 1602, 48636). A planktivorous species that generally remains within a few meters of the reef. Juveniles may sometimes pick on parasites on the epidermis of other fish (Ref. 5503). Oviparous (Ref. 205). Form pairs during breeding (Ref. 205).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Form pairs during breeding (Ref. 205).
Steene, R.C., 1978. Butterfly and angelfishes of the world. A.H. & A.W. Reed Pty Ltd., Australia. vol. 1. 144 p. (Ref. 4859)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Fisheries: minor commercial; aquarium: commercial
Estimates based on models
Preferred temperature (Ref. 115969
): 23.6 - 29.1, mean 27.9 °C (based on 2680 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02291 (0.01446 - 0.03630), b=3.04 (2.90 - 3.18), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic level (Ref. 69278
): 3.5 ±0.41 se; based on food items.
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (20 of 100) .