Convict Cichlid - Complete Care Guide

The Convict Cichlid (Amatitlania nigrofasciata) earns its name from bold black-and-white barring, but its reputation in the hobby comes from something else entirely: territorial aggression wildly out of proportion to its size. At 6 inches (male) or 4.5 inches (female), it's a small cichlid that will vigorously defend territory against fish several times larger - and it's also one of the easiest cichlids in the hobby to breed, often without any deliberate effort from the keeper.

Photo: JSutton93 - Wikimedia Commons, CC BY-SA 4.0

Parameter	Value
Adult size	6 in (male), 4.5 in (female)
Minimum tank (single/pair)	30 gallons
Breeding pair tank	30-gal breeder (36" long)
Two breeding pairs	40-gal breeder minimum
Temperament	Highly territorial, not community-safe

Size Versus Attitude

A 6-inch male Convict Cichlid is modest by cichlid standards, but size tells you almost nothing about how it behaves in a tank. Convict Cichlid defends territory with a boldness usually seen in fish twice its size, challenging tank mates regardless of their size advantage. Keepers new to cichlids often underestimate this species specifically because the size number looks unthreatening on paper.

Tank Requirements Scale With Breeding Intentions

A single Convict Cichlid or an established pair does fine in 30 gallons. The number changes the moment breeding enters the picture: a 30-gallon breeder tank (the long, 36-inch-footprint style, not a standard 30-gallon) is the practical minimum for one breeding pair to establish and defend a territory without constant conflict, and housing two breeding pairs pushes the requirement to a 40-gallon breeder so each pair can hold separate ground.

One of the Easiest Cichlids to Breed

Convict Cichlid has a reputation as a prolific, low-effort breeder - pair a compatible male and female in stable water with a cave or flowerpot to secure eggs against, and breeding often happens without any deliberate conditioning from the keeper. This ease is a double-edged trait: new cichlid keepers get unplanned fry regularly, and fry numbers can climb faster than tank space allows for if a breeding pair isn't managed intentionally.

Tank Mates: Mostly a Short List

Peaceful community fish are a poor match for Convict Cichlid's territorial defense. Compatible tank mates skew toward other robust, similarly-sized Central American cichlids that can hold their own ground, or a species-only setup that sidesteps the aggression question entirely.

Related Guides

• Jewel Cichlid Care Guide
• Green Terror Cichlid Care Guide
• Salvini Cichlid Care Guide