XANTHICHTHYS AUROMARGINATUS - (BENNETT, 1832)
Actinopterygii (Gigaclass) > Actinopteri (Class) > Teleostei (Subclass) > Tetraodontiformes (Order) > Balistoidei (Suborder) > Balistidae (Family) > Xanthichthys (Genus)
Bluechin guilded triggerfish, Bluechin triggerfish, Gilded triggerfish, Guilded triggerfish, blue throat trigger fish, Blue Jaw Trigger Fish, baliste à marges dorées, baliste jaune, baliste doré,
Description
Le baliste à marges dorées a le corps trapu de forme ovale et latéralement aplati. Il est gris bleuté ou gris jaunâtre avec de petits points blancs formant des lignes horizontales. Ces points s'élargissent à partir de la moitié inférieure des flancs. Ses yeux sont bordés de bleu vif et un point blanc est situé un peu en avant au niveau de la narine. Sa petite bouche est bordée de noir. La femelle a de fines lignes horizontales bleutées sur la tête. Le mâle a une grande tache bleue au niveau de la gorge et le bord de ses nageoires est jaune sauf celui des nageoires pectorales qui sont translucides. Profondeur 8 - 147m. Taille adulte max. 30cm.
Biotope
Ce baliste vit généralement sur les pentes récifales abruptes, rares au dessus des 20 mètres.
Alimentation
Il se nourrit de zooplancton.
Distribution
Indo-Pacifique de l'Afrique de l'Est aux îles Hawaï, du sud du Japon au nord de l'Australie. Présent en Nouvelle-Calédonie.
Synonyme
Balistes auromarginatus (Bennett, 1832)
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Description
Dorsal spines (total): 3; Dorsal soft rays (total): 27-30; Anal spines: 0; Anal soft rays: 25 - 27. Xanthichthys auromarginatus has an oval shaped, laterally flat body that is a bluish-gray color with white scale spots. There are bright metallic blue rings around the eyes. The males can be differentiated by the yellow outline on the fins and tail as well as the distinctive bright blue splash across the jaw and throat. The male’s coloration becomes more dramatic with age. Like other trigger fishes, it can hold its dorsal spines erect and use them to lock itself into the rockwork making it virtually impossible to remove. They usually sleep locked into the rock in a favorite hiding place. When Xanthichthys auromarginatus gets excited it can generate a grunting or popping sound that can be heard. They often make this sound frantically when out of the water. Max length : 30.0 cm ; usuallly 22.0 cm. Depth range 8 - 150 m, usually 25 - 150 m.
Etymology
Xanthichthys: Greek, xanthos = yellow + Greek, ichthys = fish.
Distribution
Indo-Pacific: East Africa to the Hawaiian Islands, north to the Ryukyus, south to Cocos-Keeling Atoll and New Caledonia.
Biology
Occur in upper margins of current-swept seaward drop-offs and ledges. Current-prone and with rich invertebrate growth such as seawhips. Usually found at moderate depths over 20 meters and occuring in small loose groups. Benthopelagic. Form loose aggregations a few meters above the bottom where it feeds on zooplankton, particularly copepods. Oviparous. Taken by drive-in nets, gill nets, and handlines, but not marketed.
Bluechin guilded triggerfish, Bluechin triggerfish, Gilded triggerfish, Guilded triggerfish, blue throat trigger fish, Blue Jaw Trigger Fish, baliste à marges dorées, baliste jaune, baliste doré,
Description
Le baliste à marges dorées a le corps trapu de forme ovale et latéralement aplati. Il est gris bleuté ou gris jaunâtre avec de petits points blancs formant des lignes horizontales. Ces points s'élargissent à partir de la moitié inférieure des flancs. Ses yeux sont bordés de bleu vif et un point blanc est situé un peu en avant au niveau de la narine. Sa petite bouche est bordée de noir. La femelle a de fines lignes horizontales bleutées sur la tête. Le mâle a une grande tache bleue au niveau de la gorge et le bord de ses nageoires est jaune sauf celui des nageoires pectorales qui sont translucides. Profondeur 8 - 147m. Taille adulte max. 30cm.
Biotope
Ce baliste vit généralement sur les pentes récifales abruptes, rares au dessus des 20 mètres.
Alimentation
Il se nourrit de zooplancton.
Distribution
Indo-Pacifique de l'Afrique de l'Est aux îles Hawaï, du sud du Japon au nord de l'Australie. Présent en Nouvelle-Calédonie.
Synonyme
Balistes auromarginatus (Bennett, 1832)
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Description
Dorsal spines (total): 3; Dorsal soft rays (total): 27-30; Anal spines: 0; Anal soft rays: 25 - 27. Xanthichthys auromarginatus has an oval shaped, laterally flat body that is a bluish-gray color with white scale spots. There are bright metallic blue rings around the eyes. The males can be differentiated by the yellow outline on the fins and tail as well as the distinctive bright blue splash across the jaw and throat. The male’s coloration becomes more dramatic with age. Like other trigger fishes, it can hold its dorsal spines erect and use them to lock itself into the rockwork making it virtually impossible to remove. They usually sleep locked into the rock in a favorite hiding place. When Xanthichthys auromarginatus gets excited it can generate a grunting or popping sound that can be heard. They often make this sound frantically when out of the water. Max length : 30.0 cm ; usuallly 22.0 cm. Depth range 8 - 150 m, usually 25 - 150 m.
Etymology
Xanthichthys: Greek, xanthos = yellow + Greek, ichthys = fish.
Distribution
Indo-Pacific: East Africa to the Hawaiian Islands, north to the Ryukyus, south to Cocos-Keeling Atoll and New Caledonia.
Biology
Occur in upper margins of current-swept seaward drop-offs and ledges. Current-prone and with rich invertebrate growth such as seawhips. Usually found at moderate depths over 20 meters and occuring in small loose groups. Benthopelagic. Form loose aggregations a few meters above the bottom where it feeds on zooplankton, particularly copepods. Oviparous. Taken by drive-in nets, gill nets, and handlines, but not marketed.