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Least Killifish (Heterandria) Tank Mates & Compatibility

Least Killifish (Heterandria)

Heterandria formosa

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TemperamentPeaceful (1/10)
Adult Size3.5 cm
Temperature18–27°C
Water TypeBrackish Tolerant
Swim ZoneSurface, Mid-level, Bottom
StockingGroup of 3+
Showing 97 - 120 of 735 Tank Mates

Least Killifish (Heterandria) & Betta Macrostoma

Heterandria formosa · Betta macrostoma

Not Recommended
Least Killifish (Heterandria): PeacefulBetta Macrostoma: Semi-Aggressive

Least Killifish (Heterandria) & Betta Smaragdina

Heterandria formosa · Betta smaragdina

Possible with Caution
Least Killifish (Heterandria): PeacefulBetta Smaragdina: Semi-Aggressive

Least Killifish (Heterandria) & Black Acara

Heterandria formosa · Cichlasoma bimaculatum

Possible with Caution
Least Killifish (Heterandria): PeacefulBlack Acara: Semi-Aggressive

Least Killifish (Heterandria) & Black Belt Cichlid

Heterandria formosa · Vieja maculicauda

Possible with Caution
Least Killifish (Heterandria): PeacefulBlack Belt Cichlid: Aggressive

Least Killifish (Heterandria) & Black Bullhead Catfish

Heterandria formosa · Ameiurus melas

Not Recommended
Least Killifish (Heterandria): PeacefulBlack Bullhead Catfish: Aggressive

Least Killifish (Heterandria) & Black Corydoras

Heterandria formosa · Corydoras schultzei

Possible with Caution
Least Killifish (Heterandria): PeacefulBlack Corydoras: Peaceful

Least Killifish (Heterandria) & Black Diamond Cichlid

Heterandria formosa · Paratilapia polleni

Not Recommended
Least Killifish (Heterandria): PeacefulBlack Diamond Cichlid: Aggressive

Least Killifish (Heterandria) & Black Fin Cory

Heterandria formosa · Corydoras leucomelas

Possible with Caution
Least Killifish (Heterandria): PeacefulBlack Fin Cory: Peaceful

Least Killifish (Heterandria) & Black Ghost Knifefish

Heterandria formosa · Apteronotus albifrons

Not Recommended
Least Killifish (Heterandria): PeacefulBlack Ghost Knifefish: Semi-Aggressive

Least Killifish (Heterandria) & Black Kuhli Loach

Heterandria formosa · Pangio oblonga

Possible with Caution
Least Killifish (Heterandria): PeacefulBlack Kuhli Loach: Peaceful

Least Killifish (Heterandria) & Black Marble Hoplo

Heterandria formosa · Megalechis thoracata

Possible with Caution
Least Killifish (Heterandria): PeacefulBlack Marble Hoplo: Mostly Peaceful

Least Killifish (Heterandria) & Black Neon Tetra

Heterandria formosa · Hyphessobrycon herbertaxelrodi

Possible with Caution
Least Killifish (Heterandria): PeacefulBlack Neon Tetra: Peaceful

Least Killifish (Heterandria) & Black Ocellatus

Heterandria formosa · Lamprologus speciosus

Possible with Caution
Least Killifish (Heterandria): PeacefulBlack Ocellatus: Aggressive

Least Killifish (Heterandria) & Black Pacu

Heterandria formosa · Colossoma macropomum

Possible with Caution
Least Killifish (Heterandria): PeacefulBlack Pacu: Mostly Peaceful

Least Killifish (Heterandria) & Black Phantom Tetra

Heterandria formosa · Hyphessobrycon megalopterus

Possible with Caution
Least Killifish (Heterandria): PeacefulBlack Phantom Tetra: Peaceful

Least Killifish (Heterandria) & Black Ruby Barb

Heterandria formosa · Pethia nigrofasciata

Possible with Caution
Least Killifish (Heterandria): PeacefulBlack Ruby Barb: Mostly Peaceful

Least Killifish (Heterandria) & Black Skirt Tetra

Heterandria formosa · Gymnocorymbus ternetzi

Possible with Caution
Least Killifish (Heterandria): PeacefulBlack Skirt Tetra: Mostly Peaceful

Least Killifish (Heterandria) & Black-Banded Rainbowfish

Heterandria formosa · Melanotaenia nigrans

Possible with Caution
Least Killifish (Heterandria): PeacefulBlack-Banded Rainbowfish: Peaceful

Least Killifish (Heterandria) & Blackline Rasbora

Heterandria formosa · Rasbora borapetensis

Possible with Caution
Least Killifish (Heterandria): PeacefulBlackline Rasbora: Peaceful

Least Killifish (Heterandria) & Bladder Snail (Pest Snail)

Heterandria formosa · Physella acuta

Possible with Caution
Least Killifish (Heterandria): PeacefulBladder Snail (Pest Snail): Peaceful

Least Killifish (Heterandria) & Bleeding Heart Tetra

Heterandria formosa · Hyphessobrycon erythrostigma

Possible with Caution
Least Killifish (Heterandria): PeacefulBleeding Heart Tetra: Peaceful

Least Killifish (Heterandria) & Bleher's Rainbowfish

Heterandria formosa · Chilatherina bleheri

Possible with Caution
Least Killifish (Heterandria): PeacefulBleher's Rainbowfish: Peaceful

Least Killifish (Heterandria) & Blind Cave Tetra

Heterandria formosa · Astyanax mexicanus

Possible with Caution
Least Killifish (Heterandria): PeacefulBlind Cave Tetra: Mostly Peaceful

Least Killifish (Heterandria) & Blood Parrot Cichlid

Heterandria formosa · Hybrid cichlid (Blood Parrot)

Possible with Caution
Least Killifish (Heterandria): PeacefulBlood Parrot Cichlid: Semi-Aggressive