10 fish · Human-reviewed
Simply Submerged Aquatics reviewed guidance
Choose a healthy fish before it enters your tank.
A central library for checking healthy appearance, normal behavior and reasons to pause before buying popular freshwater aquarium fish.
Reviewed and published
Browse 120 freshwater fish.
Each fish links directly to its healthy signs, warning signs and species-normal behavior in the complete buying guide.
10 fish · Human-reviewed
How to Choose Healthy Fancy Goldfish, Boesemani Rainbowfish & 8 More Aquarium Fish
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10 fish · Human-reviewed
How to Choose Healthy Freshwater Angelfish, White Cloud Mountain Minnow & 8 More Aquarium Fish
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10 fish · Human-reviewed
How to Choose Healthy Common Molly, Brilliant Rummy-nose Tetra & 8 More Aquarium Fish
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10 fish · Human-reviewed
How to Choose Healthy Bronze or Albino Corydoras, Pearl Gourami & 8 More Aquarium Fish
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10 fish · Human-reviewed
How to Choose Healthy Swordtail, Celestial Pearl Danio & 8 More Aquarium Fish
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10 fish · Human-reviewed
How to Choose Healthy Bristlenose Pleco, Endler's Livebearer & 8 More Aquarium Fish
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10 fish · Human-reviewed
How to Choose Healthy Dwarf Gourami, Convict Cichlid & 8 More Aquarium Fish
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10 fish · Human-reviewed
How to Choose Healthy Cherry Barb, Common Pleco & 8 More Aquarium Fish
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10 fish · Human-reviewed
How to Choose Healthy Discus, Black Neon Tetra & 8 More Aquarium Fish
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10 fish · Human-reviewed
How to Choose Healthy Neon Tetras, Panda Corydoras & 8 More Aquarium Fish
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10 fish · Human-reviewed
How to Choose Healthy Betta, Goldfish & 8 More Aquarium Fish
Read the complete guidePublished fish A–Z
Find the fish you are considering.
Every card opens the exact section for that species, including its healthy signs, reasons to pause, and normal behavior. A photograph appears only when it meets the aquarium-photo standard.
ReviewedAfrican Butterfly CichlidAnomalochromis thomasi
ReviewedAfrican ButterflyfishPantodon buchholzi
ReviewedBala SharkBalantiocheilos melanopterusReviewedBettaBetta splendens
ReviewedBlack Ghost KnifefishApteronotus albifrons
ReviewedBlack Neon TetraHyphessobrycon herbertaxelrodi
ReviewedBlack Skirt TetraGymnocorymbus ternetzi
ReviewedBleeding Heart TetraHyphessobrycon erythrostigma
ReviewedBlood Parrot CichlidHybrid cichlid trade form
ReviewedBloodfin TetraAphyocharax anisitsi
ReviewedBlue Peacock CichlidAulonocara stuartgranti
ReviewedBoesemani RainbowfishMelanotaenia boesemani
ReviewedBolivian RamMikrogeophagus altispinosusReviewedBrilliant Rummy-nose TetraPetitella bleheriReviewedBristlenose PlecoAncistrus sp.
ReviewedBuenos Aires TetraPsalidodon anisitsi
ReviewedBumblebee CatfishMicroglanis iheringi
ReviewedCelestial Pearl DanioDanio margaritatus
ReviewedChili RasboraBoraras brigittae
ReviewedChinese Algae EaterGyrinocheilus aymonieri
ReviewedChocolate GouramiSphaerichthys osphromenoides
ReviewedClown KnifefishChitala ornata
ReviewedClown PlecoPanaqolus maccus
ReviewedCobalt Blue Zebra CichlidMaylandia callainos
ReviewedCommon or Comet GoldfishCarassius auratus
ReviewedDemasoni CichlidChindongo demasoniReviewedDiscusSymphysodon spp.ReviewedDwarf GouramiTrichogaster lalius
ReviewedDwarf Neon RainbowfishMelanotaenia praecox
ReviewedDwarf PencilfishNannostomus marginatus
ReviewedDwarf SynodontisSynodontis petricola
ReviewedElectric Yellow LabLabidochromis caeruleus
ReviewedElephantnose FishGnathonemus petersii
ReviewedEmerald Dwarf RasboraDanio erythromicron
ReviewedExclamation-point RasboraBoraras urophthalmoidesReviewedFancy GoldfishCarassius auratus
ReviewedFeatherfin SqueakerSynodontis eupterus
ReviewedFlowerhorn CichlidHybrid cichlidReviewedFreshwater AngelfishPterophyllum scalare
ReviewedFrontosaCyphotilapia frontosa
ReviewedGlass CatfishKryptopterus vitreolus
ReviewedGlowlight DanioDanio choprae
ReviewedGlowlight TetraHemigrammus erythrozonus
ReviewedGolden Wonder KillifishAplocheilus lineatus
ReviewedGreen Neon TetraParacheirodon simulans
ReviewedGreen Terror CichlidAndinoacara rivulatusReviewedGuppyPoecilia reticulata
ReviewedIridescent Shark CatfishPangasianodon hypophthalmus
ReviewedJack Dempsey CichlidRocio octofasciata
ReviewedJohanni CichlidMelanochromis johannii
ReviewedLambchop RasboraTrigonostigma espei
ReviewedMarbled HatchetfishCarnegiella strigataReviewedNeon TetraParacheirodon innesi
ReviewedOdessa BarbPethia padamya
ReviewedOranda GoldfishCarassius auratus (domestic Oranda variety)
ReviewedPanda CorydorasHoplisoma panda (formerly Corydoras panda)
ReviewedPanda GarraGarra flavatra
ReviewedParkinson's RainbowfishMelanotaenia parkinsoni
ReviewedPearl DanioDanio albolineatusReviewedPearl GouramiTrichopodus leerii
ReviewedPhoenix RasboraBoraras merah
ReviewedPygmy CorydorasCorydoras pygmaeus
ReviewedRainbow ShinerNotropis chrosomus
ReviewedRanchu GoldfishCarassius auratus
ReviewedRed Zebra CichlidMaylandia estherae
ReviewedRed-eye Red-tail PufferCarinotetraodon irrubesco
ReviewedRed-head Tapajos EartheaterGeophagus pyrocephalus
ReviewedRedhook Silver DollarMyloplus rubripinnis
ReviewedRedtail CatfishPhractocephalus hemioliopterus
ReviewedRopefishErpetoichthys calabaricus
ReviewedSilver HatchetfishGasteropelecus sternicla
ReviewedSkunk LoachYasuhikotakia morleti
ReviewedSpotted Blue-eyePseudomugil gertrudaeReviewedSwordtailXiphophorus hellerii
ReviewedTexas CichlidHerichthys cyanoguttatus
ReviewedThreadfin RainbowfishIriatherina werneri
ReviewedThree-spot GouramiTrichopodus trichopterus
ReviewedUpside-down CatfishSynodontis nigriventris
ReviewedWeather or Dojo LoachMisgurnus anguillicaudatus
ReviewedWestern MosquitofishGambusia affinis
ReviewedWhite Cloud Mountain MinnowTanichthys albonubesReviewedYoyo LoachBotia almorhaeWhat every guide checks
Look at the whole fish, not one symptom.
A store-side screen cannot diagnose disease, but it can help you notice patterns and pause a risky purchase.
Healthy appearance
Body condition, skin, fins, eyes, posture and breathing that make sense together for the species.
Normal behavior
Species-specific resting, hiding, schooling, feeding and social behavior that can otherwise be mistaken for illness.
Reasons to pause
Visible damage, abnormal breathing, poor body condition or temperament concerns worth discussing before purchase.
TankWiseFreshwater decisions, made clearerA healthy fish still needs the right aquarium.
Use TankWise to compare adult size, water overlap, social needs and temperament with the tank you already keep.