Appearance: Reaches about 3 to 4 inches (7.5–10 cm) in length. Males are typically smaller than females and feature a notched anal fin called an andropodium, used for internal fertilization.
Diet: Omnivorous with a strong herbivorous leaning. They are excellent algae eaters and should be fed a diet high in vegetable content, such as spirulina flakes or blanched
It is highly regarded by hobbyists for its "trout-like" black speckling, vibrant yellow chest, and energetic, open-water swimming behavior
Water Conditions:
Temperature: Prefer cooler water between 65–75°F (18–24°C). Temperatures consistently above 77°F (25°C) can be harmful.
pH & Hardness: They thrive in hard, alkaline water with a pH between 7.0 and 8.0.
Filtration: Appreciate clean, well-oxygenated water with some flow to mimic their natural river habitats.
Maintenance: Large weekly water changes (up to 60-80%) are recommended to keep the strain healthy and robust.
Unique Breeding Biology
Unlike most common livebearers like guppies, goodeids have a more complex reproductive system.
Trophotaenia: Developing fry are nourished by a specialized structure similar to a mammalian placenta, which can sometimes be seen attached to the young at birth.
Fry Size: Females produce small broods (5–30 fry) every two months. The newborns are exceptionally large—around 0.6 to 0.75 inches—and can immediately eat crushed flakes or baby brine shrimp.
Sperm Storage: They do not store sperm; a new mating is required for every brood