Least Killifish (Heterandria) Tank Mates & Compatibility

Least Killifish (Heterandria)

Heterandria formosa

View full care guide

TemperamentPeaceful (1/10)

Adult Size3.5 cm

Temperature18–27°C

Water TypeBrackish Tolerant

Swim ZoneSurface, Mid-level, Bottom

StockingGroup of 3+

Stocking calculator

Compatible on paper, but will Least Killifish (Heterandria) fit your setup?

Tank mates can still go wrong if the tank is too small, already full, or the water is a poor match. Add Least Killifish (Heterandria) to the stocking calculator to check space, stocking pressure, and water needs before you add it.

Least Killifish (Heterandria)

Test in my tank

Showing 1 - 24 of 183 Tank Mates

Least Killifish (Heterandria) & African Butterfly Cichlid

Heterandria formosa · Anomalochromis thomasi

🟡Possible with Caution

Least Killifish (Heterandria): PeacefulAfrican Butterfly Cichlid: Mostly Peaceful

Least Killifish (Heterandria) & African Butterfly Fish

Heterandria formosa · Pantodon buchholzi

🔴Not Recommended

Least Killifish (Heterandria): PeacefulAfrican Butterfly Fish: Semi-Aggressive

Least Killifish (Heterandria) & African Jewel Cichlid

Heterandria formosa · Hemichromis bimaculatus

🟡Possible with Caution

Least Killifish (Heterandria): PeacefulAfrican Jewel Cichlid: Aggressive

Least Killifish (Heterandria) & African Lungfish

Heterandria formosa · Protopterus annectens

🔴Not Recommended

Least Killifish (Heterandria): PeacefulAfrican Lungfish: Highly Aggressive

Least Killifish (Heterandria) & Agassiz's Dwarf Cichlid

Heterandria formosa · Apistogramma agassizii

🟡Possible with Caution

Least Killifish (Heterandria): PeacefulAgassiz's Dwarf Cichlid: Semi-Aggressive

Least Killifish (Heterandria) & Amano Shrimp

Heterandria formosa · Caridina multidentata

🟡Possible with Caution

Least Killifish (Heterandria): PeacefulAmano Shrimp: Peaceful

Least Killifish (Heterandria) & Amazon Leaf Fish

Heterandria formosa · Monocirrhus polyacanthus

🔴Not Recommended

Least Killifish (Heterandria): PeacefulAmazon Leaf Fish: Peaceful

Least Killifish (Heterandria) & Amazon Puffer

Heterandria formosa · Colomesus asellus

🟡Possible with Caution

Least Killifish (Heterandria): PeacefulAmazon Puffer: Mostly Peaceful

Least Killifish (Heterandria) & Apple Snail

Heterandria formosa · Pomacea maculata

🟡Possible with Caution

Least Killifish (Heterandria): PeacefulApple Snail: Peaceful

Least Killifish (Heterandria) & Assassin Snail

Heterandria formosa · Clea helena

🟢Ideal Tank Mates

Least Killifish (Heterandria): PeacefulAssassin Snail: Peaceful

Least Killifish (Heterandria) & Auratus Cichlid (Mbuna)

Heterandria formosa · Melanochromis auratus

🟡Possible with Caution

Least Killifish (Heterandria): PeacefulAuratus Cichlid (Mbuna): Highly Aggressive

Least Killifish (Heterandria) & Bala Shark

Heterandria formosa · Balantiocheilos melanopterus

🔴Not Recommended

Least Killifish (Heterandria): PeacefulBala Shark: Mostly Peaceful

Least Killifish (Heterandria) & Bamboo Shrimp

Heterandria formosa · Atyopsis moluccensis

🟢Ideal Tank Mates

Least Killifish (Heterandria): PeacefulBamboo Shrimp: Peaceful

Least Killifish (Heterandria) & Banded Archerfish (Brackish)

Heterandria formosa · Toxotes jaculatrix

🔴Not Recommended

Least Killifish (Heterandria): PeacefulBanded Archerfish (Brackish): Semi-Aggressive

Least Killifish (Heterandria) & Beckford's Pencilfish

Heterandria formosa · Nannostomus beckfordi

🟡Possible with Caution

Least Killifish (Heterandria): PeacefulBeckford's Pencilfish: Peaceful

Least Killifish (Heterandria) & Bee Shrimp (Crystal Red / Black)

Heterandria formosa · Caridina cantonensis

🔴Not Recommended

Least Killifish (Heterandria): PeacefulBee Shrimp (Crystal Red / Black): Peaceful

Least Killifish (Heterandria) & Betta (Siamese Fighting Fish)

Heterandria formosa · Betta splendens

🟡Possible with Caution

Least Killifish (Heterandria): PeacefulBetta (Siamese Fighting Fish): Semi-Aggressive

Least Killifish (Heterandria) & Black Ghost Knifefish

Heterandria formosa · Apteronotus albifrons

🔴Not Recommended

Least Killifish (Heterandria): PeacefulBlack Ghost Knifefish: Semi-Aggressive

Least Killifish (Heterandria) & Black Neon Tetra

Heterandria formosa · Hyphessobrycon herbertaxelrodi

🟡Possible with Caution

Least Killifish (Heterandria): PeacefulBlack Neon Tetra: Peaceful

Least Killifish (Heterandria) & Black Pacu

Heterandria formosa · Colossoma macropomum

🟡Possible with Caution

Least Killifish (Heterandria): PeacefulBlack Pacu: 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) & 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) & Blind Cave Tetra

Heterandria formosa · Astyanax mexicanus

🟡Possible with Caution

Least Killifish (Heterandria): PeacefulBlind Cave Tetra: Mostly Peaceful