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Potamotrygon leopoldi


Potamotrygon leopoldi
Polka Dot Stingray
黑白魟
Potamotrygon leopoldi is aruably one of the most stunning freshwater species in the hobby and comes with a price tag to match. A fully grown one of these makes a jaw-dropping sight. A rare form in which the light spots appear as rings with black centres is known as Potamotrygon leopoldi "eclipse" is more costly still. The stunning P. sp. "Itaituba" (P14) may be a leopoldi variant or an undescribed species. 
P. henlei is also very similar but can be told apart by the presence of spots on the underside of the disc, which Potamotrygon leopoldi is supposed to lack. A handful of keepers have reported that their leopoldi specimens do exhibit this pattern, a phenomenon which some have surmised should be attributed to captive hybridisation. 
黑色的盘体上点缀着白色圆点(通常成3、2、1排列),是其最大的特征,永不退流行的黑白双色系,造就黑白魟成为市场上超高人气的鱼种.黑白魟身上白色圆点的大小、形状、排列、颜色,及表面的粗糙度会因采集地不同而有所差异。当饲养过程中水质出现变化(水温、PH剧烈震荡、亚硝酸太高...等),常会出现白点拖长的现象,也就是俗称的"跑点".这是水质劣化的警讯,应立即加强水质管理。虾、泥鳅、小鱼....等饵料接受度高
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