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''Mobula japanica'', commonly known as the spinetail devil ray, spinetail mobula ray or japanese mobula ray, is a species of pelagic marine fish which belongs to the family Myliobatidae. It is found throughout the tropical and sub-tropical waters of the Indo-Pacific and eastern Atlantic Ocean. ==Description== The spinetail mobula ray is a large ray which can grow up to a maximal width of 3.1 m (average width 2.3 m). Like most rays, it is dorsoventrally flattened and has relatively large triangular pectoral fins on either side of the main body disc. At the front, it has a pair of cephalic fins which are forward extensions of the pectoral fins. These can be rolled up in a spiral for swimming or can be flared out to channel water into the ventral mouth when the animal is feeding. The background body coloration of the dorsal side is deep blue-mauve with a large black band stretches from eye to eye. The ventral side is white. The inner surface of the cephalic fins are silver-grey with black tips, while the outer surface and side behind eye are white. The species can be distinguished from other large rays by its prjecting head, a white-tipped dorsal fin, a spine between the base of the dorsal fin and the start of the tail, and the length of its tail. Its spiracle is just above the area where the pectoral fin meets the body.〔(【引用サイトリンク】publisher=Encyclopedia of Life )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Spinetail mobula」の詳細全文を読む スポンサード リンク
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