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Percina roanoka : ウィキペディア英語版 | Percina roanoka
''Percina roanoka'' (common name Roanoke darter) is a species of darter native to Virginia, West Virginia and North Carolina in the United States.〔 ==Description== Breeding male ''Percina roanoka'' have black heads and red or orange jaws. They have black spinal fins with orange bands. Their anal, pelvic and pectoral fins are white with transparent membranes. They have sides whose coloration ranges from dark brown to back, with blue, yellow or green highlights. Females and nonbreeding males are colored similarly, although their colors are less intense than those of breeding males.〔 The darter has from nine to twelve dorsal fin spines, seven to nine anal fins and nine to twelve dorsal fin rays.〔 The darter has an average length of , although the maximum reported length of a specimen of ''P. roanoka'' is . The darter has a maximum life span of three years.
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「Percina roanoka」の詳細全文を読む
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