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razorback sucker : ウィキペディア英語版 | razorback sucker
The razorback sucker (''Xyrauchen texanus'') is a critically endangered fresh water sucker of rivers in the Colorado River drainage of western North America. ==Description==
The razorback sucker is most notable for the sharp-edged bulge on the anterior part of its back, between the head and dorsal fin, giving rise to its common name, as well as to the alternative name "humpback sucker". The fish can attain sizes of up to 1.0 m (3.3 ft) and weights of 6.0 kg (13.2 lb) 〔Minckley, W.L. 1973. Fishes of Arizona. Arizona Game and Fish Department, Phoenix. pp. 145-146, 153-155〕 The fish has an olivaceous to brown-black color on top grading to a lighter yellow below. Adult razorbacks are easily distinguished from other suckers by the predorsal keel.〔
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「razorback sucker」の詳細全文を読む
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