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FishbeginnerFreshwater

Red Devil Molly

Poecilia sphenops

AnimaliaChordataActinopterygii

Variety of Molly · red devil

📍 Central America

Ask Finn

The Red Devil Molly displays a deep red-orange coloration and is a popular color variant in the aquarium trade. It shares the same hardy, peaceful temperament as other mollies and does well in community tanks.

Size3"
Min Tank15g
School3+
peaceful
Zonemid

Care Guide

Diet

Red Devil Mollies are omnivorous and should be fed high-quality flake food or pellets as a staple, supplemented 2-3 times weekly with frozen foods like brine shrimp, daphnia, or bloodworms. Include vegetable matter such as blanched spinach or algae wafers to support digestive health. Feed small amounts once daily, only what they can consume in 2-3 minutes.

Behavior

Red Devil Mollies are peaceful, active swimmers that spend most of their time in mid-water levels, though they occasionally browse near the substrate. They are social fish that do well in small groups or pairs and exhibit minimal aggression toward tankmates. Males may display mild territorial behavior during breeding season but rarely cause serious conflict.

Breeding

Breeding Red Devil Mollies in captivity is relatively easy, as they are livebearers that reproduce readily in established tanks with adequate food and stable conditions. Females produce 20-100 fry every 4-6 weeks; provide dense plants like Java Moss or Water Sprite for fry to hide and increase survival rates. Separate fry into a nursery tank if you wish to raise them successfully, as adults may consume young.

Common Diseases

Fin Rot

Symptoms

Frayed, discolored, or deteriorating fins; lethargy and loss of appetite

Treatment

Perform 25-30% water changes every 2-3 days, improve water quality, and treat with aquarium salt (1 teaspoon per 5 gallons) or antibacterial medication if severe

Ich (White Spot Disease)

Symptoms

Small white spots on body and fins, excessive scratching against objects, rapid breathing

Treatment

Raise water temperature gradually to 28-30°C, treat with aquarium salt or commercial ich medication for 7-10 days, and perform frequent water changes

Velvet Disease

Symptoms

Fine golden or rust-colored dust on body, clamped fins, lethargy, rapid gill movement

Treatment

Treat with copper-based medication or salt baths; dim lighting may help as the parasite is light-sensitive; maintain excellent water quality

Constipation

Symptoms

Bloated appearance, lethargy, loss of appetite, feces trailing from vent

Treatment

Feed blanched vegetables like spinach or peas; perform water changes and reduce feeding temporarily; ensure varied diet with adequate fiber

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