Asia
Boraras naevus
Temp24–28°C
pH5–6.5
Size1.3 cm
Diet—
SwimMiddle
DifficultyEasy
fish
Very small fish (about 5 cm adult length or less)
Species with adult length at or below 5 cm where measured — confirm group needs and filtration for small bodies of water.
90 species
- Asia
Scarlet badis
Dario dario
Temp18–26°CpH6.5–8.5Size1.5 cmDiet—SwimMiddleDifficultyModerateScarlet badis
Dario dario
- South America
Ember tetra
Hyphessobrycon amandae
Temp24–28°CpH6–7Size2 cmDiet—SwimMiddleDifficultyModerateEmber tetra
Hyphessobrycon amandae
- South America
Endlers guppy
Poecilia wingei
Temp24–30°CpH7–8.5Size2 cmDietOmnivoreSwimAll levelsDifficultyEasyEndlers guppy
Poecilia wingei
- Asia
Betta channoides
Temp24–28°CpH5–6.5Size2 cmDiet—SwimMiddleDifficultyModerateBetta channoides
- Asia
Stiphodon surrufus
Temp—pH—Size2.1 cmDietOmnivoreSwimBottomDifficultyHardStiphodon surrufus
- Asia
Galaxy rasbora
Danio margaritatus
Temp20–26°CpH6.5–7.5Size2.1 cmDiet—SwimMiddleDifficultyEasyGalaxy rasbora
Danio margaritatus
- South America
Pygmy corydoras
Corydoras pygmaeus
Temp22–26°CpH6–8Size2.1 cmDiet—SwimBottomDifficultyEasyPygmy corydoras
Corydoras pygmaeus
- Asia
Danio tinwini
Temp22–26°CpH6.5–7.5Size2.2 cmDiet—SwimMiddleDifficultyModerateDanio tinwini
- Asia
Sundadanio axelrodi
Temp23–26°CpH5–6.5Size2.3 cmDiet—SwimMiddleDifficultyModerateSundadanio axelrodi
- South America
Neon tetra
Paracheirodon innesi var.
Temp20–26°CpH5–7Size2.5 cmDietOmnivoreSwimMiddleDifficultyEasyNeon tetra
Paracheirodon innesi var.
Caridina dennerli
Temp26–30°CpH7.5–8.5Size2.5 cmDietOmnivoreSwimMiddleDifficultyModerateCaridina dennerli
- Asia
Dwarf rasbora
Boraras maculatus
Temp24–28°CpH5–6Size2.5 cmDietOmnivoreSwimMiddleDifficultyModerateDwarf rasbora
Boraras maculatus
- South America
Neon tetra
Paracheirodon innesi
Temp21–25°CpH5–7Size2.5 cmDiet—SwimMiddleDifficultyEasyNeon tetra
Paracheirodon innesi
- Asia
Microdevario microphthalma
Temp20–26°CpH6.5–7.5Size2.6 cmDietInsectivoreSwimMiddleDifficulty—Microdevario microphthalma
- Asia
Oryzias woworae
Temp24–28°CpH6–7Size2.8 cmDiet—SwimMiddleDifficultyModerateOryzias woworae
- Asia
Betta albimarginata
Temp24–28°CpH5–6.5Size2.8 cmDiet—SwimMiddleDifficultyModerateBetta albimarginata
Neocaridina davidi
Temp18–28°CpH6.5–8Size3 cmDiet—SwimMiddleDifficultyEasyNeocaridina davidi
Neocaridina davidi var. rili
Temp18–28°CpH6.5–8Size3 cmDiet—SwimMiddleDifficultyEasyNeocaridina davidi var. rili
- Asia
Sawbwa barb
Sawbwa resplendens
Temp20–24°CpH7–8Size3 cmDiet—SwimMiddleDifficultyModerateSawbwa barb
Sawbwa resplendens
- South America
Cardinal tetra
Paracheirodon axelrodi
Temp23.9–28.9°CpH4–6Size3 cmDietPlanktivoreSwimMiddleDifficultyEasyCardinal tetra
Paracheirodon axelrodi
Neocaridina davidi var. yellow
Temp18–28°CpH6.5–8Size3 cmDietOmnivoreSwimMiddleDifficultyEasyNeocaridina davidi var. yellow
Neritina natalensis
Temp22–28°CpH7–8.5Size3 cmDiet—SwimMiddleDifficultyModerateNeritina natalensis
- South America
Parotocinclus eppleyi
Temp22–26°CpH6–7Size3 cmDiet—SwimBottomDifficultyModerateParotocinclus eppleyi
- Asia
Emerald Dwarf Rasbora
Danio erythromicron
Temp20–24°CpH7–8Size3 cmDietOmnivoreSwimMiddleDifficultyEasyEmerald Dwarf Rasbora
Danio erythromicron
Anentome helena
Temp20–28°CpH6.5–7.5Size3 cmDietCarnivoreSwimMiddleDifficultyExpertAnentome helena
Vittina olivacea
Temp22–28°CpH7–8.5Size3 cmDietHerbivoreSwimMiddleDifficultyModerateVittina olivacea
Neocaridina davidi var. blue
Temp18–28°CpH6.5–8Size3 cmDietOmnivoreSwimMiddleDifficultyModerateNeocaridina davidi var. blue
- Asia
Danio choprae
Temp22–26°CpH6.5–7.5Size3.1 cmDietOmnivoreSwimMiddleDifficultyModerateDanio choprae
- Asia
Red Cherry Rasbora
Rasbora lacrimula
Temp22–26°CpH4–7.5Size3.1 cmDietInsectivoreSwimMiddleDifficulty—Red Cherry Rasbora
Rasbora lacrimula
- South America
Black neon tetra
Hyphessobrycon herbertaxelrodi
Temp22–28°CpH5.5–7.5Size3.2 cmDiet—SwimMiddleDifficultyEasyBlack neon tetra
Hyphessobrycon herbertaxelrodi
- South America
Red phantom tetra
Hyphessobrycon sweglesi
Temp22.2–27.8°CpH5.5–7.5Size3.2 cmDiet—SwimMiddleDifficultyModerateRed phantom tetra
Hyphessobrycon sweglesi
- South America
Nannoptopoma sternoptychum
Temp—pH—Size3.3 cmDietOmnivoreSwimBottomDifficultyModerateNannoptopoma sternoptychum
- South America
Otocinclus vittatus
Temp21–26°CpH6–7.5Size3.3 cmDiet—SwimBottomDifficultyEasyOtocinclus vittatus
- South America
Glowlight tetra
Hemigrammus erythrozonus
Temp22–28°CpH6–8Size3.3 cmDiet—SwimMiddleDifficultyEasyGlowlight tetra
Hemigrammus erythrozonus
- South America
Rosy tetra
Hyphessobrycon rosaceus
Temp23.9–27.8°CpH5.8–7.5Size3.4 cmDiet—SwimMiddleDifficultyModerateRosy tetra
Hyphessobrycon rosaceus
- Asia
Boraras brigittae
Temp24–28°CpH6.5–7Size3.5 cmDietOmnivoreSwimMiddleDifficultyEasyBoraras brigittae
- Asia
Malabar pufferfish
Carinotetraodon travancoricus
Temp22–26°CpH7.5–8.3Size3.5 cmDietOmnivoreSwimMiddleDifficultyExpertMalabar pufferfish
Carinotetraodon travancoricus
- Asia
Danio kyathit
Temp22–26°CpH6.5–7.5Size3.5 cmDiet—SwimMiddleDifficultyEasyDanio kyathit
- Oceania
Honey blue eye
Pseudomugil mellis
Temp24–28°CpH6–8Size3.5 cmDiet—SwimMiddleDifficultyModerateHoney blue eye
Pseudomugil mellis
- South America
Black phantom tetra
Hyphessobrycon megalopterus
Temp22–26°CpH6–7.5Size3.6 cmDiet—SwimMiddleDifficultyModerateBlack phantom tetra
Hyphessobrycon megalopterus
- Asia
Rhinogobius zhoui
Temp15–24°CpH7–8Size3.6 cmDietOmnivoreSwimMiddleDifficultyModerateRhinogobius zhoui
- South America
Blackline penguinfish
Thayeria boehlkei
Temp22–28°CpH6–8Size3.6 cmDiet—SwimMiddleDifficultyModerateBlackline penguinfish
Thayeria boehlkei
- Asia
Stiphodon percnopterygionus
Temp22–28°CpH7–8Size3.7 cmDietOmnivoreSwimMiddleDifficultyModerateStiphodon percnopterygionus
- Asia
Dwarf danio
Danio nigrofasciatus
Temp22–26°CpH6.5–7Size3.7 cmDiet—SwimMiddleDifficultyEasyDwarf danio
Danio nigrofasciatus
- South America
Panda corydoras
Corydoras panda
Temp22–26°CpH6–8Size3.8 cmDiet—SwimBottomDifficultyEasyPanda corydoras
Corydoras panda
- South America
Silvertip tetra
Hasemania nana
Temp22–28°CpH6–8Size3.8 cmDiet—SwimMiddleDifficultyModerateSilvertip tetra
Hasemania nana
- Asia
Zebra danio
Danio rerio
Temp—pH6–8Size3.8 cmDiet—SwimAll levelsDifficultyEasyZebra danio
Danio rerio
- Asia
Spotted blue-eye
Pseudomugil gertrudae
Temp23–28°CpH6–6Size3.8 cmDiet—SwimMiddleDifficultyModerateSpotted blue-eye
Pseudomugil gertrudae
- South America
Chessboard cichlid
Dicrossus filamentosus
Temp24–28°CpH5–7Size3.8 cmDietOmnivoreSwimMiddleDifficultyModerateChessboard cichlid
Dicrossus filamentosus
- South America
Lemon tetra
Hyphessobrycon pulchripinnis
Temp23–28°CpH5.5–8Size3.8 cmDiet—SwimMiddleDifficultyModerateLemon tetra
Hyphessobrycon pulchripinnis
- South America
Umbrella cichlid
Apistogramma borellii
Temp20–26°CpH6–8Size3.9 cmDietOmnivoreSwimBottomDifficultyModerateUmbrella cichlid
Apistogramma borellii
- South America
Schwartz's catfish
Corydoras schwartzi
Temp22–26°CpH6–8Size3.9 cmDiet—SwimBottomDifficultyModerateSchwartz's catfish
Corydoras schwartzi
- Asia
Pygmy gourami
Trichopsis pumila
Temp24–28°CpH6–7Size4 cmDiet—SwimMiddleDifficultyModeratePygmy gourami
Trichopsis pumila
- South America
Jewel tetra
Hyphessobrycon eques
Temp20–28°CpH5–7.8Size4 cmDiet—SwimMiddleDifficultyModerateJewel tetra
Hyphessobrycon eques
- South America
Jewel tetra
Hyphessobrycon eques var.
Temp22–26°CpH5–7.8Size4 cmDietOmnivoreSwimMiddleDifficultyModerateJewel tetra
Hyphessobrycon eques var.
- Asia
Japanese rice fish
Oryzias latipes
Temp5–30°CpH7–8Size4 cmDiet—SwimAll levelsDifficultyModerateJapanese rice fish
Oryzias latipes
- Asia
Least rasbora
Boraras urophthalmoides
Temp24–28°CpH6–7Size4 cmDietOmnivoreSwimMiddleDifficultyEasyLeast rasbora
Boraras urophthalmoides
- Asia
Hara jerdoni
Temp18–24°CpH6–7.5Size4 cmDietOmnivoreSwimBottomDifficultyModerateHara jerdoni
- Central America
Southern platyfish
Xiphophorus maculatus
Temp22–28°CpH7–8Size4 cmDiet—SwimMiddleDifficultyEasySouthern platyfish
Xiphophorus maculatus
- Africa
Multies
Neolamprologus multifasciatus
Temp24–27°CpH8–9Size4 cmDiet—SwimMiddleDifficultyModerateMulties
Neolamprologus multifasciatus
- Asia
Threadfin rainbowfish
Iriatherina werneri
Temp22–30°CpH6–8Size4 cmDiet—SwimMiddleDifficultyModerateThreadfin rainbowfish
Iriatherina werneri
- Asia
White cloud mountain minnow
Tanichthys albonubes
Temp14–22°CpH6–8Size4 cmDiet—SwimMiddleDifficultyEasyWhite cloud mountain minnow
Tanichthys albonubes
- Africa
Banded panchax
Pseudepiplatys annulatus
Temp23–26°CpH6.5–7Size4 cmDietInsectivoreSwimMiddleDifficultyModerateBanded panchax
Pseudepiplatys annulatus
- Oceania
Stiphodon pelewensis
Temp—pH—Size4.1 cmDietOmnivoreSwimBottomDifficultyHardStiphodon pelewensis
- South America
Splash tetra
Copella arnoldi
Temp22–28°CpH6–8Size4.2 cmDiet—SwimMiddleDifficultyModerateSplash tetra
Copella arnoldi
- South America
Ram cichlid
Mikrogeophagus ramirezi var.
Temp26–30°CpH5–6Size4.2 cmDietOmnivoreSwimMiddleDifficultyModerateRam cichlid
Mikrogeophagus ramirezi var.
- South America
Ram cichlid
Mikrogeophagus ramirezi
Temp27–30°CpH5–6Size4.2 cmDietOmnivoreSwimMiddleDifficultyModerateRam cichlid
Mikrogeophagus ramirezi
- South America
Ornate tetra
Hyphessobrycon bentosi
Temp24–28°CpH5.8–7.5Size4.3 cmDietOmnivoreSwimMiddleDifficultyModerateOrnate tetra
Hyphessobrycon bentosi
- Asia
Mugilogobius hitam
Temp24–28°CpH7–8Size4.3 cmDietInsectivoreSwimBottomDifficulty—Mugilogobius hitam
- South America
Agassiz's dwarf cichlid
Apistogramma agassizii
Temp23–29°CpH5–7Size4.4 cmDiet—SwimBottomDifficultyModerateAgassiz's dwarf cichlid
Apistogramma agassizii
- South America
Otocinclus cocama
Temp21–25°CpH6–7Size4.4 cmDiet—SwimBottomDifficultyModerateOtocinclus cocama
- Asia
Javanese ricefish
Oryzias javanicus
Temp22–28°CpH7.5–8.5Size4.5 cmDiet—SwimMiddleDifficultyModerateJavanese ricefish
Oryzias javanicus
- Asia
Stiphodon semoni
Temp22–28°CpH7–8Size4.6 cmDietOmnivoreSwimMiddleDifficultyModerateStiphodon semoni
- Asia
Ruby barb
Pethia padamya
Temp20–25°CpH6.5–7.5Size4.6 cmDiet—SwimMiddleDifficultyModerateRuby barb
Pethia padamya
- South America
Head-and-taillight tetra
Hemigrammus ocellifer
Temp22–28°CpH6–8Size4.9 cmDietOmnivoreSwimMiddleDifficultyModerateHead-and-taillight tetra
Hemigrammus ocellifer
- South America
Rummy-nose tetra
Hemigrammus rhodostomus
Temp24–28°CpH5.5–7Size5 cmDiet—SwimMiddleDifficultyEasyRummy-nose tetra
Hemigrammus rhodostomus
- Asia
Stiphodon atropurpureus
Temp22–28°CpH7–8Size5 cmDiet—SwimMiddleDifficultyModerateStiphodon atropurpureus
- Asia
Pseudogastromyzon cheni
Temp15–24°CpH6.5–7.5Size5 cmDietOmnivoreSwimBottomDifficultyModeratePseudogastromyzon cheni
Caridina multidentata
Temp15–27°CpH6.5–7.5Size5 cmDietHerbivoreSwimAll levelsDifficultyEasyCaridina multidentata
- Asia
Harlequin rasbora
Trigonostigma heteromorpha var
Temp—pH5–7Size5 cmDietOmnivoreSwimMiddleDifficultyEasyHarlequin rasbora
Trigonostigma heteromorpha var
- Asia
Blue danio
Danio kerri
Temp22–26°CpH6.5–7Size5 cmDiet—SwimMiddleDifficultyEasyBlue danio
Danio kerri
- Asia
Cherry barb
Puntius titteya
Temp23–27°CpH6–8Size5 cmDietOmnivoreSwimMiddleDifficultyModerateCherry barb
Puntius titteya
- Oceania
Forktail rainbowfish
Pseudomugil furcatus
Temp—pH6–8Size5 cmDiet—SwimMiddleDifficultyModerateForktail rainbowfish
Pseudomugil furcatus
- South America
Twosaddle corydoras
Corydoras weitzmani
Temp22–26°CpH6–8Size5 cmDiet—SwimBottomDifficultyModerateTwosaddle corydoras
Corydoras weitzmani
- South America
Guppy
Poecilia reticulata
Temp22–28°CpH7–8Size5 cmDietOmnivoreSwimMiddleDifficultyEasyGuppy
Poecilia reticulata
- Asia
Checkered barb
Oliotius oligolepis
Temp20–25°CpH6–6.5Size5 cmDietOmnivoreSwimMiddleDifficultyModerateCheckered barb
Oliotius oligolepis
Ghost shrimp
Palaemonetes paludosus
Temp15–27°CpH6.5–7.5Size5 cmDietOmnivoreSwimMiddleDifficultyModerateGhost shrimp
Palaemonetes paludosus
- Asia
Dwarf rainbowfish
Melanotaenia praecox
Temp22.8–27.8°CpH6.8–7.5Size5 cmDiet—SwimMiddleDifficultyModerateDwarf rainbowfish
Melanotaenia praecox
- Asia
Harlequin rasbora
Trigonostigma heteromorpha
Temp21–28°CpH5–7Size5 cmDiet—SwimMiddleDifficultyEasyHarlequin rasbora
Trigonostigma heteromorpha
Staurogyne repens
Temp20–28°CpH6–7.5Size5 cmDietOmnivoreSwimMiddleDifficultyModerateStaurogyne repens
- South America
Cockatoo cichlid
Apistogramma cacatuoides
Temp22–29°CpH6–8Size5 cmDietOmnivoreSwimBottomDifficultyEasyCockatoo cichlid
Apistogramma cacatuoides
