Least Killifish (Heterandria) & Cockatoo Dwarf Cichlid
Heterandria formosa · Apistogramma cacatuoides
Least Killifish (Heterandria): PeacefulCockatoo Dwarf Cichlid: Semi-Aggressive
Back to all fishesView full care guide
Least Killifish (Heterandria) Tank Mates & Compatibility
Least Killifish (Heterandria)
Heterandria formosa
TemperamentPeaceful (1/10)
Adult Size3.5 cm
Temperature18–27°C
Water TypeBrackish Tolerant
Swim ZoneSurface, Mid-level, Bottom
StockingGroup of 3+
Showing 193 - 216 of 735 Tank Mates
Possible with Caution
Least Killifish (Heterandria) & Colombian Shark Catfish (Brackish)
Heterandria formosa · Ariopsis seemanni
Least Killifish (Heterandria): PeacefulColombian Shark Catfish (Brackish): Semi-Aggressive
Least Killifish (Heterandria) & Colombian Tetra
Heterandria formosa · Hyphessobrycon columbianus
Least Killifish (Heterandria): PeacefulColombian Tetra: Mostly Peaceful
Least Killifish (Heterandria) & Common Pleco
Heterandria formosa · Hypostomus plecostomus
Least Killifish (Heterandria): PeacefulCommon Pleco: Mostly Peaceful
Least Killifish (Heterandria) & Common Pleco (Amazon Sailfin)
Heterandria formosa · Pterygoplichthys pardalis
Least Killifish (Heterandria): PeacefulCommon Pleco (Amazon Sailfin): Mostly Peaceful
Least Killifish (Heterandria) & Common Synodontis (False Upside Down Catfish)
Heterandria formosa · Synodontis nigrita
Least Killifish (Heterandria): PeacefulCommon Synodontis (False Upside Down Catfish): Mostly Peaceful
Least Killifish (Heterandria) & Common Whiptail Catfish
Heterandria formosa · Rineloricaria eigenmanni
Least Killifish (Heterandria): PeacefulCommon Whiptail Catfish: Peaceful
Least Killifish (Heterandria) & Congo Bichir
Heterandria formosa · Polypterus endlicheri congicus
Least Killifish (Heterandria): PeacefulCongo Bichir: Aggressive
Least Killifish (Heterandria) & Congo Puffer (Potato Puffer)
Heterandria formosa · Tetraodon miurus
Least Killifish (Heterandria): PeacefulCongo Puffer (Potato Puffer): Highly Aggressive
Least Killifish (Heterandria) & Congo Tetra
Heterandria formosa · Phenacogrammus interruptus
Least Killifish (Heterandria): PeacefulCongo Tetra: Peaceful
Least Killifish (Heterandria) & Contradens Pleco (Snowball Variant)
Heterandria formosa · Hypancistrus contradens
Least Killifish (Heterandria): PeacefulContradens Pleco (Snowball Variant): Mostly Peaceful
Least Killifish (Heterandria) & Convict Cichlid
Heterandria formosa · Amatitlania nigrofasciata
Least Killifish (Heterandria): PeacefulConvict Cichlid: Aggressive
Least Killifish (Heterandria) & Copper Harlequin Rasbora
Heterandria formosa · Trigonostigma hengeli
Least Killifish (Heterandria): PeacefulCopper Harlequin Rasbora: Peaceful
Least Killifish (Heterandria) & Corona Rainbowfish
Heterandria formosa · Melanotaenia corona
Least Killifish (Heterandria): PeacefulCorona Rainbowfish: Peaceful
Least Killifish (Heterandria) & Crimsonspotted Rainbowfish
Heterandria formosa · Melanotaenia duboulayi
Least Killifish (Heterandria): PeacefulCrimsonspotted Rainbowfish: Peaceful
Least Killifish (Heterandria) & Crying Whiptail
Heterandria formosa · Loricaria sp. "Rio Atabapo"
Least Killifish (Heterandria): PeacefulCrying Whiptail: Peaceful
Least Killifish (Heterandria) & Cuban Cichlid
Heterandria formosa · Nandopsis tetracanthus
Least Killifish (Heterandria): PeacefulCuban Cichlid: Aggressive
Least Killifish (Heterandria) & Cuban Gar
Heterandria formosa · Atractosteus tristoechus
Least Killifish (Heterandria): PeacefulCuban Gar: Semi-Aggressive
Least Killifish (Heterandria) & Cuckoo Catfish
Heterandria formosa · Synodontis multipunctatus
Least Killifish (Heterandria): PeacefulCuckoo Catfish: Semi-Aggressive
Least Killifish (Heterandria) & Cupid Cichlid
Heterandria formosa · Biotodoma cupido
Least Killifish (Heterandria): PeacefulCupid Cichlid: Mostly Peaceful
Least Killifish (Heterandria) & Cutteri Cichlid
Heterandria formosa · Amatitlania cutteri
Least Killifish (Heterandria): PeacefulCutteri Cichlid: Aggressive
Least Killifish (Heterandria) & Cyprichromis Leptosoma
Heterandria formosa · Cyprichromis leptosoma
Least Killifish (Heterandria): PeacefulCyprichromis Leptosoma: Mostly Peaceful
Least Killifish (Heterandria) & Dainty Cory (Salt and Pepper Cory)
Heterandria formosa · Corydoras habrosus
Least Killifish (Heterandria): PeacefulDainty Cory (Salt and Pepper Cory): Peaceful
Least Killifish (Heterandria) & Debauwi Catfish (Three-Striped Glass Catfish)
Heterandria formosa · Pareutropius buffei
Least Killifish (Heterandria): PeacefulDebauwi Catfish (Three-Striped Glass Catfish): Peaceful