Some of the most exquisite and rare live-bearer fish species can be found in the mollie genus, or mollienesia, as it was initially categorized. Unquestionably, the sailfin mollie is one of the most unusual fish species currently in commerce. However, due to their fragility, mollies are arguably the most challenging of all the typical live-bearers to maintain. They frequently acquire an affliction known as “shimmies” when chilly or exposed to environmental stress of any kind. In truth, this is simply a stress-related condition with symptoms compounded, not an infectious disease