Frontosas are social predators, so a spacious species aquarium is the clearest starting point. Companions must share the intended water conditions, be too large to swallow and leave the frontosas able to feed. None of the ten suggestions below is guaranteed compatible.
Plan the adult group first using the frontosa care guide. Adding other fish requires further territory and waste capacity, not just spare-looking space between juveniles. Keep a suitable established aquarium available for separation.
1. Blue dolphin cichlid: space and group needs first
Cyrtocara moorii is a large Malawi cichlid with its own social and swimming requirements. Check the actual overlap in temperature and mineral content. A relatively mild reputation does not guarantee that a mixed group will remain calm or that slower frontosas will get enough food.
2. Jack Dempsey: a poor default choice
A Jack Dempsey may become territorial, especially while breeding. Do not push its water chemistry to the high end of a Tanganyika setup simply to fit a stock list. Its temperament and the frontosas’ feeding behavior make this an uncertain pairing.
3. Peacock cichlids: identify the species
Peacocks differ in adult size and assertiveness. Small females and juveniles may be vulnerable to predation, while active males can monopolize food or territory. “Blue peacock” is not a complete species identification.
4. Starry night cichlid: do not equate hardiness with compatibility
Fish sold as Paratilapia need reliable identification and their own suitable conditions. Madagascar is not Lake Tanganyika. A large mouth, potential territoriality and an approximate pH overlap do not establish that this fish belongs in a frontosa community.
5. Black calvus: one of the more plausible conditional options
Altolamprologus calvus is a Tanganyika crevice predator. Its species profile describes slow growth and thick, serrated scales. Those scales are not protection against being swallowed. Use sufficiently grown fish with narrow refuges, and deliver food where they can eat without competing with larger residents.
6. Yellow lab: still an mbuna
Labidochromis caeruleus is often less combative than many mbuna, but its smaller size and active behavior still matter. Adults need their own territories; juveniles can become prey. Do not treat the species as a universal exception to all Malawi–Tanganyika compatibility concerns.
7. Cuckoo catfish: plan social space and breeding consequences
Synodontis multipunctatus is a Tanganyika catfish with its own group and shelter needs. Its species account describes brood parasitism in mouthbrooding cichlids. Consider that behavior when planning a breeding aquarium; do not assume the catfish will leave eggs or fry untouched.
Identify the actual catfish rather than buying any spotted Synodontis. Supply sinking food directly and check that nighttime activity does not prevent frontosas from resting.
8. Red rainbowfish: chemistry and feeding-speed limitations
Red rainbowfish need a proper shoal and substantial open swimming space. Their species profile gives pH 7–8, so do not assume suitability for a tank maintained near pH 9. Their rapid feeding can also leave frontosas short of food.
9. Common pleco: identify it and do not rely on armor
“Common pleco” covers several large suckermouth catfish, not one fish with universal water tolerance. Check the species, adult size and intended chemistry. The common pleco guide explains identification and feeding. Remove any fish that attaches to a tank mate; do not wait for the cichlid to fight it off.
10. Mbu puffer: unsuitable as a routine frontosa companion
Tetraodon mbu is a giant specialist fish with powerful teeth. Its species profile recommends solitary housing and a very large adult aquarium. A calm individual or a successful video does not make a puffer reliably safe with frontosas. Plan a separate specialist setup.
When to abandon a combination
Repeated pursuit, hiding, damaged fins or missed meals require action. Match water conditions before introduction, quarantine fish separately and observe all feeding areas. Predation risk increases as frontosas grow, so a peaceful juvenile combination must be reassessed at adult size.
