Yucatan Molly | The Velvet Wanderer

Yucatan Sailfin Molly (Poecilia velifera)

The Yucatan Sailfin Molly brings a striking presence to the aquarium, particularly when a mature male raises his magnificent, sail-like dorsal fin. Native to Mexico’s Yucatán Peninsula, this impressive livebearer is admired for its elegant proportions, subtle iridescence, and fascinating courtship displays.

Found naturally in coastal lagoons, wetlands, and other mineral-rich waters, the Yucatan Sailfin Molly thrives in spacious aquariums with warm, hard, alkaline water. Although capable of living in freshwater or brackish conditions, stable water parameters are essential to its long-term health.

Peaceful and social, these mollies make beautiful additions to appropriately sized community aquariums. Their active swimming habits and impressive adult size make them especially rewarding for aquarists who can provide plenty of room to explore.

Care Guide

• Scientific Name: Poecilia velifera
• Common Name: Yucatan Sailfin Molly
• Origin: Yucatán Peninsula, Mexico
• Adult Size: Approximately 5–7 inches
• Minimum Aquarium Size: 55 gallons recommended
• Temperature: 75–82°F
• pH: 7.5–8.5
• Water Hardness: Hard to very hard
• Water Type: Freshwater or appropriately maintained brackish water
• Temperament: Generally peaceful and social
• Diet: Omnivorous, with a strong preference for algae and vegetable matter
• Care Level: Intermediate
• Compatibility: Other peaceful fish that tolerate similar water conditions

Aquarium Considerations

Provide ample open swimming space alongside hardy aquatic plants, natural hiding areas, and effective filtration. Males may display territorial or competitive behavior toward one another, particularly when females are present. A group with more females than males can help reduce persistent courtship pressure.

Yucatan Sailfin Mollies are livebearers, meaning females give birth to free-swimming young rather than laying eggs. Breeding can occur readily in suitable conditions.

Live Arrival Policy

Live fish are not eligible for standard returns. Any concerns regarding arrival condition must be reported within 2 hours of confirmed delivery, with clear photographs of the fish and shipping packaging, in accordance with our Live Arrival Guarantee.