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fathead minnow
The fathead minnow (''Pimephales promelas''), is a species of temperate freshwater fish belonging to the ''Pimephales'' genus of the cyprinid family. The natural geographic range extends throughout much of North America, from central Canada south along the Rockies to Texas, and east to Virginia and the Northeastern United States.〔Page, Lawrence M. and Brooks M. Burr (1991), ''Freshwater Fishes'', p. 129-130, Houghton Mifflin, New York, NY. ISBN 0-395-91091-9〕 This minnow has also been introduced to many other areas via bait bucket releases. Its golden, or xanthic, strain, known as the rosy-red minnow, is a very common feeder fish sold in the United States and Canada. This fish is best known for producing Schreckstoff (a distress signal).
==Physical description==
The fathead minnow in its wild form is generally dull olive-grey in appearance, with a dusky stripe extending along the back and side, and a lighter belly. There is a dusky blotch midway on the dorsal fin. Breeding males acquire a large, grey fleshy growth on the nape, as well as approximately 16 white breeding tubercles on the snout.〔〔Alderton, David (2005), ''Encyclopedia of Aquarium and Pondfish'', p. 360, Dorling Kindersley, New York, NY. ISBN 0-7566-0941-0〕
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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