Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
marino associati a barriera corallina; distribuzione batimetrica 0 - 180 m (Ref. 89972). Tropical; 26°C - 29°C (Ref. 27115); 35°N - 33°S, 30°E - 128°W
Indo-Pacific: Red Sea and East Africa (Ref. 3145) to the Hawaiian, Marquesas and Tuamoto islands, north to southern Japan, south to Lord Howe and Rapa islands. Presence in Somalia to be confirmed (Ref. 30573).
Dimensione / Peso / Età
Maturità: Lm ? range ? - ? cm
Max length : 70.0 cm FL maschio/sesso non determinato; (Ref. 9710); common length : 50.0 cm TL maschio/sesso non determinato; (Ref. 3146); Età massima riportata: 55 anni (Ref. 118238)
Spine dorsali (totale) : 6; Raggi dorsali molli (totale) : 27 - 30; Spine anali: 2; Raggi anali molli: 27 - 30. This species is characterized by the following: body depth vary from about 2.0 in SL (in subadults) to 2.4-2.6 (adults) in SL; with a tapering, bony, horn on forehead of adults projecting anteriorly at level of eye but not extending in front of mouth (horn first as a bump on forehead at a length of about 12 cm); dorsal profile from snout to horn straight, angle of about 45°; 2 peduncular plates with well-developed forward-curving knife-like spines; emarginate caudal fin when young, truncate with filamentous lobes in adult; males apparently with longer horn, larger peduncular keels and longer caudal filaments than females of the same size; body yellowish to olivaceous gray dorsally, paler ventrally, with blue peduncular plates and keel spines; lips whitish or blue; blue area is sometimes present around pectoral fin; dorsal and anal fins yellowish with narrow blue margins; caudal fin orangish basally, shading to gray, with a broad, pale greenish posterior border and caudal filaments are edged in blue; one transient color phase is a blotchy pale greenish zone below the spinous portion of dorsal fin that narrows and ends beneath the pectoral fin (Ref. 27362).
Body shape (shape guide): short and / or deep; Cross section: compressed.
Adults inhabit channels, moats, lagoon and seaward reefs with strong surge (Ref. 48637). Benthopelagic (Ref. 58302). Typically occurring in small groups. Sometimes solitary (Ref. 90102). Juveniles in shallow protected bays and harbours (Ref. 48637). Mainly diurnal, feed on coarse leafy brown algae like Sargassum. Pair-spawning has been observed. Minimum depth reported taken from Ref. 128797.
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
Spawn in pairs (Ref. 240).
Myers, R.F., 1991. Micronesian reef fishes. Second Ed. Coral Graphics, Barrigada, Guam. 298 p. (Ref. 1602)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Reports of ciguatera poisoning (Ref. 4795)
Usi umani
Pesca: commerciale; Pesce da pesca sportiva: si; Acquario: Commerciale
Strumenti
Rapporti speciali
Scarica XML
Fonti Internet
Stime basate su modelli
Temperatura preferita (Fonte Biblio.
123201): 23.4 - 28.8, mean 27.4 °C (based on 1536 cells).
Indice di diversità filogenetica (Fonte Biblio.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02399 (0.01795 - 0.03206), b=2.94 (2.86 - 3.02), in cm total length, based on LWR estimates for this species (Ref.
93245).
Livello trofico (Fonte Biblio.
69278): 2.2 ±0.11 se; based on food items.
Resilienza (Fonte Biblio.
120179): Molto basso, tempo minimo di raddoppiamento della popolazione più di 14 anni (K=0.14; tmax=54.5).
Prior r = 0.28, 95% CL = 0.18 - 0.42, Based on 3 data-limited stock assessments.
Vulnerabilità della pesca (Ref.
59153): Low to moderate vulnerability (32 of 100).
🛈
Vulnerabilità climatica (Ref.
125649): Very high vulnerability (80 of 100).
🛈
Nutrienti (Ref.
124155): Calcium = 33.3 [16.8, 58.2] mg/100g; Iron = 0.554 [0.285, 1.039] mg/100g; Protein = 18.4 [17.1, 19.7] %; Omega3 = 0.109 [0.065, 0.196] g/100g; Selenium = 58.8 [29.8, 118.5] μg/100g; VitaminA = 21.5 [5.0, 90.1] μg/100g; Zinc = 1.03 [0.66, 1.54] mg/100g (wet weight);
