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Great sand eel
The great sand eel (''Hyperoplus lanceolatus'') is the greater species of sand eel. 〔(【引用サイトリンク】title=Greater Sand-eel )〕 The maximum sixe is 35 cm.
==Description==
The great sand eel has an elongated body, with a rounded cross section. It has a long, pointed head, and a protruding lower jaw. 〔 Its upper jaw, however, is not protrusible, and this species is unable to form a tube with its mouth. A monocle "tooth-shaped" structure can be found at the front of the palate. The scales on the body cannot form a chevron pattern.〔 The skin ridge running the length of the sides of the body, spread as far as one-third of the base of the anal fin. Low and long set dorsal fins consist of 52 to 61 rays.〔 The anal fin is about half the size of the dorsal fin, and taller.〔 The pectoral fins are diminutive; the pelvic fins are absent.〔 Color ranges from a lime color on the back and upper sides to the bright silver on the lower sides and the belly. Also, a specific black smudge occurs between the eyes and the snout, which is about the same size as the diameter of the eye.〔
The great sand eel can be distinguished from the lesser sand eel because the origin of its long dorsal fin is located behind the level of the pectoral fin.〔(【引用サイトリンク】title=Greater sandeel: ''Hyperoplus lanceolatus'' )〕 Corbin's sand eel (''Hyperoplus immaculatus'') is very similar to the greater sand eel in the way that it lacks a protrusible upper jaw and its similar size. However, it can be distinguished by the lack of the black spot on the snout, but it does have a black chin.〔 Its dorsal fin has 59 to 62 rays. The overall color is darker than the other sand eels, it is found offshore, and tends to be found more on the western side of the United Kingdom〔
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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