Platax boersii Bleeker 1853

Platax boersii, the golden spadefish or Boers’ batfish, is a species of marine ray-finned fish belonging to the family Ephippidae, the spadefishes and bay fishes. This species is found in the Indo-West Pacific.

Taxonomy

Platax boersii was first formally described in 1853 by the Dutch physician, herpetologist and ichthyologist Pieter Bleeker with its type locality given as Makassar, Sulawesi, Indonesia.^[1] This species is classified within the genus Platax which belongs to the family Ephippidae^[2] in the order Moroniformes.^[3] The specific name honours Major W. J. A. W. Boers of the Royal Netherlands East Indies Army, who supplied Bleeker with the type of this fish, among others from the Dutch East Indies.^[4]

Description

Platax boersii adults have a smoothly rounded profile on the head, similar to that of the orbicular batfish (P. orbicularus) but differ in their golden sheen and the absence of small black spots. The juveniles resemble those of P.teira in their possession of extremely elongated dorsal and anal fins but differ in their silvery sheen and overall paler colour. The adults of this species, with a length exceeding 18 cm (7.1 in), are yellowish-silver in colour with a scattering of small dark spots on the body. There is a dark vertical bar through the eye and another dark bar to the rear of the head. The caudal, pectoral, anal and dorsal fins are yellowish green with the margin of the anal fin and the rear margin of the caudal fin being black. The pelvic fins are black. The small juveniles are yellowish brown or silvery, with the same 2 black bars on the head as the adults. The posterior third of the body is blackish and this continues onto the dorsal and anal fins, and the front of this black region on the body is frequently closely preceded by a thin, indistinct dark bar. The caudal fin is transparent except for its black base. The dorsal fin is supported by 5 spines and 31 to 34 soft rays while the anal fin contains 3 spines and 24 to 28 soft rays. This species has reached a maximum published total length of 40 cm (16 in).^[5]

Juvenile

Distribution and habitat

Platax boersii are found on or near reefs in depths of 10 to 60 m (33 to 197 ft) as both juveniles and adults. They can be solitary or found in small schools.^[6] Schools are found along drop offs in tall structures of corals but solitary fish are more typical inshore.^[5] These fishes are found in Indonesia, the Philippines and Papua New Guinea.^[6]

Biology

Platax boersii is little known^[6] but it has been found to be an omnivorous species eating algae, crustaceans and smaller fishes.^[7]

References

Platax boersii Platax generoko animalia da. Arrainen barruko Ephippidae familian sailkatzen da.

Banaketa

Erreferentziak

• FishBase.org

Ikus, gainera

• Platax
• Ephippidae

Platax boersii est une espèce de poissons de la famille des Ephippidae.

Platax boersii is een straalvinnige vissensoort uit de familie van schopvissen (Ephippidae).^[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1852 door Bleeker.

波氏燕鱼，为輻鰭魚綱鱸形目鱸亞目白鲳科的一個種。

分布

本魚分布于西太平洋區，包括日本、韓國、馬來西亞、印尼、菲律賓、巴布亞紐幾內亞、帛琉、夏威夷群島等海域。

深度

水深1至50公尺。

特徵

本魚體極側扁，呈菱形，頭部陡斜，口小而圓鈍。稚魚非常地有細長的垂直鰭而且非常近似尖翅燕魚(P. teira)。成魚有平滑圓形的頭部輪廓,體色為銀色，不具黑色橫紋。亞成魚體色為淡黃色的銀色, 通常有小且分散的黑色斑點在身體上, 體具2條黑色橫紋，其中一條通過眼睛。中央的鰭為淡黃綠色。臀鰭邊緣、尾柄及腹鰭黑色。頜部有條紋細長且平的三尖齒, 背鰭硬棘5枚；背鰭軟條31至34枚；臀鰭硬棘3枚；臀鰭軟條24至28枚，體長可達40公分。

生態

本魚成魚則在陡直的峭壁或礁石區。成群活動，屬雜食性，以藻類及小型無脊椎動物為食。

經濟利用

幼魚體態優美，可做為觀賞魚，成魚則可食用，肉質鮮美。

参考文献

• Froese, Rainer & Daniel Pauly, eds. (2011). Platax boersii in FishBase. 2011年12月版本

外部連結

• 波氏燕鱼的圖片

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