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Lookdown : ウィキペディア英語版
Lookdown

The lookdown (''Selene vomer'') is a game fish of the Carangidae family. It was first described in 1758 by the "father of taxonomy", Carolus Linnaeus, in the 10th edition of his book ''Systema Naturae''.
==Description==
Although the lookdown is similar to the Atlantic moonfish, it can be distinguished by its dorsal and anal fins, the second ray on each fin being many times longer than the surrounding rays. This gives the dorsal and anal fins a noticeably scythe-like shape.〔(【引用サイトリンク】title=gma.org entry on Lookdown )〕 Also, the dorsal fin of the lookdown has 9 spines and 23 rays, while the anal fin has only 3 spines and 18 rays.〔(【引用サイトリンク】title=Fishbase.org entry on Lookdown )〕 Like the Atlantic moonfish, it has a deep, rhombus-shaped, laterally-compressed body.〔 The head has the mouth set low and the eyes high. The overall profile of the head is concave.〔 The caudal fin of is forked, as in the pompanos, while the pectoral fin is scythe-like and reaches the middle of the second dorsal fin.〔
The lookdown is silvery on both sides with a darker tinge on top. A young fish has several faint vertical bars that fade as it grows.〔(【引用サイトリンク】title=gma.org entry on Lookdown )〕 The longest lookdown known was 48.3 cm long,〔Cervigón, F., 1993. Los peces marinos de Venezuela. Volume 2. Fundación Científica Los Roques, Caracas,Venezuela. 497 p.〕 and the heaviest weighed 2.1 kg.〔IGFA, 2001. Database of IGFA angling records until 2001. IGFA, Fort Lauderdale, USA.〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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