布氏鯧鯵, 卵形鯧 Trachynotus blochii

布氏鯧鯵, 卵形鯧 Trachynotus blochii 

中文俗名:

金鯧、紅杉、紅沙瓜仔、黃臘鰺。

 

英文俗名:

Snubnose pompano; Silver pampano; Silver pompano; Ovate pompano; Round pompano; Pompano; Spinous dory; Buck-nosed trevally; Asian pompano.

 

形態特徵:

體呈卵圓形，甚側扁，隨著成長而逐漸向後延長。第一背前骨呈圓形。尾柄短細，背腹側無肉質稜脊亦無凹槽。吻鈍。眼小，脂性眼瞼不發達。上下頜、鋤骨和腭骨均具細小的絨毛狀齒，隨著成長而漸退化；舌面一般無齒。第一鰓弓下枝鰓耙數(含瘤狀鰓耙)7-10。

側線幾呈直線狀或微波狀，無稜鱗。無離鰭。第一背鰭5-6硬棘，幼魚時，具鰭膜，隨著成長而漸呈游離狀；第二背鰭與臀鰭同形，前方鰭條延長而呈彎月形；無離鰭；尾鰭深叉，末端尖細。體背藍灰色，腹部銀白色；體側無任何斑點。背鰭暗色；臀鰭暗色至暗橙色而具棕色緣；尾鰭暗色至暗橙色而具黑色緣。

 

棲所生態:

幼魚主要棲息於近沿岸砂泥底質水域或砂泥底質的內灣，成魚則成群棲息於沿岸礁石底質水域。以生活於沙地之軟體動物或其它具硬殼之無脊椎動物為食。

 

地理分布:

廣泛分布於印度-太平洋之暖水域。臺灣南部、東部海域有產，一般市面上所見皆為養殖魚。

 

外觀相片(Photo-Trachinotus blochii):

 

 

 

Scientific Name:

Trachynotus blochii

 

Common Name:

Snubnose pompano; Silver pampano; Silver pompano; Ovate pompano; Round pompano; Pompano; Spinous dory; Buck-nosed trevally; Asian pompano.

 

Characteristic:

D. V-VI, I+18-19; A. II, I+16-17; P. i+17-18; G.R. 6-7+8-9; vertebrate 10+14. Body deep, ovate and compressed. Snout blunt. Maxilla extends beyond anterior border of pupil. Villiform teeth on jaws, vomer and palatines, but rudimentary with growth; tongue toothless. Lateral line slightly arched. First predorsal (supraneural) bone shaped like an inverted teardrop- or oval-shaped, this character is easily observed by simple dissection along midline of nape; supraoccipital bone of skull thin and blade-like in adults. Head and body generally silvery, blue-grey above, paler below; large adults sometimes with most of body golden orange, especially snout and lower half of body; second dorsal fin dark, lobe of fin dusky orange; anal fin dusky to dirty orange, lobe with a brownish anterior margin; caudal fin dark to dirty orange, leading edges of fin darkest; pelvic fins white to dirty orange; pectoral fins dark; juveniles silvery with pale fins, except lobes of median fins and anterior half of pelvic fins brownish to dirty orange.

 

Habitats:

Juveniles inhabit sandy shorelines and shallow sandy or muddy bays near river mouths, while adults move out in schools to clear seaward reefs and found near coral and rock reefs. Juveniles in small schools, while adults are usually solitary. Feeds primari .

 

Distribution:

 

Widely distributed in tropical and subtropical waters of Indo-West Pacific from Red Sea and East Africa to the Marshall Islands and Samoa, north to southern Japan, south to Australia; throughout Micronesia. It is very common in all Taiwanese water.