The Convict Cichlid is one of the hobby's most popular entry-level cichlids — hardy, boldly striped, and famous for breeding almost by accident. Its black-and-white vertical banding gives it a "prisoner uniform" look and its common name. Convicts are a great way to experience cichlid parenting and territorial behavior firsthand, but their aggression and prolific breeding mean they're not suited to a peaceful community tank.
Taxonomy & Classification
First described by Albert Günther in 1867, this species was moved from the genus Archocentrus to Amatitlania in 2007. It's also known as the zebra cichlid. Selective breeding has produced leucistic "white convict," "pink convict," and "gold convict" color strains that lack the wild-type barring.
| Rank | Classification |
|---|---|
| Order | Cichliformes |
| Family | Cichlidae |
| Genus | Amatitlania |
Natural Habitat
Convict cichlids are native to Central America, ranging from the Pacific slope of Guatemala and El Salvador to the Atlantic slope of Honduras and Costa Rica. They inhabit slow-moving streams, lakes, and lagoons with sand-to-mud substrates and plenty of rock and wood cover, and have also established feral populations in parts of the southern United States and Australia.
Tank Setup
A single fish can be kept in 20 gallons, but a breeding pair needs 30 gallons minimum, ideally more. Provide flat rocks, caves, or an overturned flower pot as a spawning surface, along with driftwood and hardy, well-anchored plants — convicts dig and rearrange substrate readily. Strong filtration is worthwhile given their active, messy feeding style.
Water Parameters
| Parameter | Ideal Range |
|---|---|
| Temperature | 75–80°F (24–27°C) |
| pH | 6.0–8.0 |
| Hardness (GH) | 6–8 dGH |
| Ammonia / Nitrite | 0 ppm |
| Nitrate | <30 ppm |
Diet & Feeding
Unfussy omnivores: a quality cichlid pellet or flake makes a solid staple, supplemented with frozen bloodworms, brine shrimp, and occasional vegetable matter. Convict cichlids will eat nearly anything offered, so overfeeding rather than pickiness is the main thing to watch.
Tank Mates & Temperament
Convict cichlids are territorial and become especially aggressive when breeding, defending their fry against tank mates many times their own size. They're best kept as a single pair in a species-only tank, or with other robust, similarly sized Central American cichlids in a large enough aquarium to divide territory. Avoid peaceful community fish, small tetras, and invertebrates — convicts will bully or eat them.
Breeding
Convict cichlids are famously easy to breed and are attentive, protective parents. A stable male/female pair will select a cave or flat surface, and the female lays eggs that hatch in 3–4 days; both parents guard the fry closely, often relocating them to a substrate pit. Feed newly free-swimming fry crushed flake food and baby brine shrimp. Because they breed so readily, be prepared for frequent spawns if keeping a healthy pair long-term.
Common Health Issues
- Ich — white spots; standard freshwater treatment and raised temperature
- Hole-in-the-head disease — pitting on the head/lateral line, often linked to water quality or nutrition; improve diet variety and water changes
- Stress from overcrowding — insufficient territory increases aggression and disease susceptibility; ensure adequate tank size and hiding structure
Reviewed for Central American cichlid biology accuracy and breeding-behavior guidance.
Frequently Asked Questions
Can convict cichlids live in a community tank?
Generally not recommended. Their territorial aggression, especially when breeding, makes them unsuitable for peaceful community setups.
How easy is it to breed convict cichlids?
Very easy — a healthy male/female pair in stable water conditions with a suitable cave will often spawn without any special intervention.
What size tank does a convict cichlid pair need?
30 gallons minimum for a breeding pair, with more room strongly preferred to reduce aggression toward any tank mates.