Asia
Asian Stone Catfish
Hara jerdoni
Temp18–24°C
pH5.6–7.6
Size3 cm
DietOmnivore
SwimBottom
DifficultyModerate
Adult tank12.5 L
Recommended group3
Asian Stone Catfish
Hara jerdoni
fish
Fish for nano tanks (≤ 40 L)
Species with a published minimum tank size of 40 L or less. Verify adult size and group needs before stocking small volumes.
26 species
- Asia
Malabar pufferfish
Carinotetraodon travancoricus
Temp22–28°CpH6.8–8Size2.5 cmDietCarnivoreSwimBottomDifficultyExpertAdult tank12.6 LRecommended group1Malabar pufferfish
Carinotetraodon travancoricus
- Taiwan (selectively bred from wild Neocaridina davidi)
Cherry Shrimp
Neocaridina davidi
Temp18–28°CpH6.5–8Size2.5 cmDietOmnivoreSwimBottomDifficultyEasyAdult tank19 LRecommended group5Cherry Shrimp
Neocaridina davidi
- Asia
Siamese fighting fish
Betta splendens
Temp22–30°CpH6–8Size7 cmDietCarnivoreSwimMiddleDifficultyModerateAdult tank20 LRecommended group1Keep males separate; provide steady heat, gentle flow, surface access and a cover.
Siamese fighting fish
Betta splendens
Lifespan estimate3 yrSchoolingSolo OKAggression5High aggression — research tankmates carefully
Keep males separate; provide steady heat, gentle flow, surface access and a cover.
- East Africa (Kenya, Tanzania, Mozambique)
Zebra Nerite
Vittina natalensis
Temp22–28°CpH7–8.5Size2.5 cmDietHerbivoreSwimBottomDifficultyModerateAdult tank20 LRecommended group1Provide algae-covered surfaces and stable water; protect snails from predatory tankmates.
Zebra Nerite
Vittina natalensis
SchoolingSolo OKAggression1Provide algae-covered surfaces and stable water; protect snails from predatory tankmates.
- Asia
Least rasbora
Boraras urophthalmoides
Temp24–28°CpH6–7Size2 cmDietOmnivoreSwimMiddleDifficultyEasyAdult tank20 LRecommended group8Least rasbora
Boraras urophthalmoides
- Asia
Galaxy betta
Betta splendens
Temp22–30°CpH6–8Size7 cmDietCarnivoreSwimMiddleDifficultyModerateAdult tank20 LRecommended group1Keep males separate; provide steady heat, gentle flow, surface access and a cover.
Galaxy betta
Betta splendens
Lifespan estimate3 yrSchoolingSolo OKAggression5High aggression — research tankmates carefully
Keep males separate; provide steady heat, gentle flow, surface access and a cover.
- Asia
Alien betta
Betta splendens hybrid
Temp24–30°CpH6–7.5Size6.5 cmDietCarnivoreSwimAll levelsDifficultyEasyAdult tank20 LRecommended group1Keep males separate, with steady heat, gentle flow, surface access and a cover.
Alien betta
Betta splendens hybrid
SchoolingSolo OKAggression4High aggression — research tankmates carefully
Keep males separate, with steady heat, gentle flow, surface access and a cover.
- Southeast Asia (Indonesia, Thailand, Malaysia)
Assassin Snail
Anentome helena
Temp21–27°CpH7.2–8Size3 cmDietCarnivoreSwimBottomDifficultyEasyAdult tank20 LRecommended group1Assassin Snail
Anentome helena
- Asia
Neon Blue Rasbora
Sundadanio axelrodi
Temp23–26°CpH4–6.5Size2.5 cmDietOmnivoreSwimMiddleDifficultyHardAdult tank30 LRecommended group8Neon Blue Rasbora
Sundadanio axelrodi
- West Africa
Banded panchax
Epiplatys annulatus
Temp23–26°CpH5.5–7Size3.5 cmDietInsectivoreSwimTopDifficultyModerateAdult tank30 LRecommended group4Banded panchax
Epiplatys annulatus
- Asia
White cloud mountain minnow
Tanichthys albonubes
Temp14–22°CpH6–8Size4 cmDietOmnivoreSwimMiddleDifficultyEasyAdult tank30 LRecommended group8White cloud mountain minnow
Tanichthys albonubes
- Oceania
Desert goby
Chlamydogobius eremius
Temp20–28°CpH7–8.5Size6 cmDietOmnivoreSwimMiddleDifficultyModerateAdult tank40 LRecommended group1Desert goby
Chlamydogobius eremius
- Oceania
Honey blue eye
Pseudomugil mellis
Temp24–28°CpH6–7.5Size3.5 cmDietOmnivoreSwimMiddleDifficultyModerateAdult tank40 LRecommended group6Provide dense cover, stable warm water and room for fish to retreat from displaying males.
Honey blue eye
Pseudomugil mellis
SchoolingYesAggression1Provide dense cover, stable warm water and room for fish to retreat from displaying males.
- Asia
Dwarf rasbora
Boraras maculatus
Temp20–28°CpH5–6.5Size2.5 cmDietOmnivoreSwimMiddleDifficultyModerateAdult tank40 LRecommended group10Dwarf rasbora
Boraras maculatus
- South America
Guppy
Poecilia reticulata
Temp17–28°CpH7–8Size6 cmDietOmnivoreSwimTopDifficultyEasyAdult tank40 LRecommended group3Guppy
Poecilia reticulata
- Asia
Javanese ricefish
Oryzias javanicus
Temp24–29°CpH7–9Size3.5 cmDietOmnivoreSwimMiddleDifficultyModerateAdult tank40 LRecommended group6Javanese ricefish
Oryzias javanicus
- Asia
Pygmy gourami
Trichopsis pumila
Temp22–28°CpH5–7.5Size4 cmDietOmnivoreSwimMiddleDifficultyModerateAdult tank40 LRecommended group2Pygmy gourami
Trichopsis pumila
- Japan, Taiwan, Korea
Amano Shrimp
Caridina multidentata
Temp18–28°CpH6.5–7.5Size5 cmDietHerbivoreSwimAll levelsDifficultyEasyAdult tank40 LRecommended group3Amano Shrimp
Caridina multidentata
- Southeastern United States
Ghost shrimp
Palaemon paludosus
Temp18–28°CpH6.5–8Size4 cmDietOmnivoreSwimMiddleDifficultyEasyAdult tank40 LRecommended group3Ghost shrimp
Palaemon paludosus
- Lake Tanganyika
Multies
Neolamprologus multifasciatus
Temp24–27°CpH7.5–9Size4.5 cmDietOmnivoreSwimMiddleDifficultyModerateAdult tank40 LRecommended group6Multies
Neolamprologus multifasciatus
- Asia
Daisy's Rice Fish
Oryzias woworae
Temp23–27°CpH6–7.5Size3 cmDietOmnivoreSwimMiddleDifficultyModerateAdult tank40 LRecommended group6Daisy's Rice Fish
Oryzias woworae
- Oceania
Spotted blue-eye
Pseudomugil gertrudae
Temp21–28°CpH4.5–7.5Size3.8 cmDietPlanktivoreSwimMiddleDifficultyModerateAdult tank40 LRecommended group8Spotted blue-eye
Pseudomugil gertrudae
- Africa
Gold Shell Dweller
Lamprologus ocellatus
Temp23–27°CpH7.5–9Size6 cmDietOmnivoreSwimMiddleDifficultyModerateAdult tank40 LRecommended group2Gold Shell Dweller
Lamprologus ocellatus
- South America
Ember tetra
Hyphessobrycon amandae
Temp20–28°CpH5–7Size2 cmDietOmnivoreSwimMiddleDifficultyEasyAdult tank40 LRecommended group8Ember tetra
Hyphessobrycon amandae
- South America
Zebra Oto
Otocinclus cocama
Temp21–25°CpH6–7.5Size4.5 cmDietHerbivoreSwimBottomDifficultyModerateAdult tank40 LRecommended group6Zebra Oto
Otocinclus cocama