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Black Molly · Sailfin Molly · Dalmatian Molly
Hardy livebearer that greets you at the glass
Tough, friendly community fish that eat algae, greet their owners, and give birth to live babies. Keep males-only or accept a steady stream of fry — a lively 20-gallon community suits them best.
Photo: Wikimedia Commons / Patit Paban Halder / CC BY-SA 4.0
Care guide last reviewed: · Care requirements referenced from veterinary and humane standards.
20-gallon heated, filtered community tank.
Virtually silent (1/5)
Highly independent — comfortable alone 8+ hours
Thrives with daily company
Curated starter supplies researched for this companion's specific anatomy and needs
Mollies are heavy herbivores that graze on biofilm and green algae constantly; spirulina wafers prevent constipation and support digestive tract health.
Originating in coastal brackish waters, mollies are vulnerable to "the shimmies" and velvet disease in pure soft water; aquarium salt supports electrolyte balance.
Mollies quickly sicken in acidic water below pH 7.5; calcium-rich aragonite substrate naturally buffers water hardness and maintains an alkaline 7.8-8.2 pH.
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