Freshwater fish

Care guides for 128 species. Tank size, temperament, schooling needs, water parameters, and compatibility for each one.

Tetras 20

• Neon tetra Paracheirodon innesi 4 cm · group of 6+ · beginner
• Ember tetra Hyphessobrycon amandae 2 cm · group of 6+ · beginner
• Cardinal tetra Paracheirodon axelrodi 3 cm · group of 6+ · intermediate
• Black neon tetra Hyphessobrycon herbertaxelrodi 4 cm · group of 6+ · beginner
• Rummynose tetra Hemigrammus bleheri 5 cm · group of 8+ · intermediate
• Black skirt tetra Gymnocorymbus ternetzi 6 cm · group of 6+ · beginner
• Glowlight tetra Hemigrammus erythrozonus 4 cm · group of 6+ · beginner
• Lemon tetra Hyphessobrycon pulchripinnis 5 cm · group of 6+ · beginner
• Bleeding heart tetra Hyphessobrycon erythrostigma 7 cm · group of 8+ · beginner
• Congo tetra Phenacogrammus interruptus 8.5 cm · group of 6+ · intermediate
• Serpae tetra Hyphessobrycon eques 4 cm · group of 8+ · beginner
• Beckford's pencilfish Nannostomus beckfordi 6.5 cm · group of 8+ · beginner
• Bloodfin tetra Aphyocharax anisitsi 5.5 cm · group of 8+ · beginner
• Pristella tetra Pristella maxillaris 4.5 cm · group of 6+ · beginner
• Diamond tetra Makunaima pittieri 6 cm · group of 8+ · beginner
• Green neon tetra Paracheirodon simulans 3 cm · group of 10+ · intermediate
• Marble hatchetfish Carnegiella strigata 4 cm · group of 6+ · intermediate
• Silver dollar Metynnis argenteus 18 cm · group of 5+ · beginner
• Buenos Aires tetra Psalidodon anisitsi 10 cm · group of 6+ · beginner
• Silvertip tetra Hasemania nana 4 cm · group of 6+ · beginner

Rasboras and danios 14

• Harlequin rasbora Trigonostigma heteromorpha 4.5 cm · group of 6+ · beginner
• Celestial pearl danio Danio margaritatus 2.5 cm · group of 6+ · beginner
• Tiger barb Puntigrus tetrazona 7 cm · group of 8+ · beginner
• Cherry barb Puntius titteya 5 cm · group of 6+ · beginner
• Chili rasbora Boraras brigittae 2 cm · group of 8+ · intermediate
• White cloud mountain minnow Tanichthys albonubes 4 cm · group of 6+ · beginner · pond zones 4-10
• Zebra danio Danio rerio 5 cm · group of 6+ · beginner · pond zones 8-12
• Denison barb Sahyadria denisonii 12 cm · group of 6+ · intermediate
• Glowlight rasbora Trigonostigma hengeli 3 cm · group of 8+ · beginner
• Pygmy rasbora Boraras maculatus 2.5 cm · group of 8+ · intermediate
• Gold barb Barbodes semifasciolatus 8 cm · group of 6+ · beginner
• Phoenix rasbora Boraras merah 2 cm · group of 10+ · intermediate
• Rosy barb Pethia conchonius 14 cm · group of 6+ · beginner · pond zones 8-12
• Pearl danio Danio albolineatus 6 cm · group of 6+ · beginner · pond zones 8-12

Livebearers 7

• Guppy Poecilia reticulata 5 cm · beginner
• Endler's livebearer Poecilia wingei 3 cm · beginner
• Platy Xiphophorus maculatus 5 cm · beginner
• Common molly Poecilia sphenops 8 cm · intermediate
• Swordtail Xiphophorus hellerii 10 cm · intermediate
• Variatus platy Xiphophorus variatus 7 cm · beginner
• Least killifish Heterandria formosa 3.5 cm · group of 6+ · beginner

Catfish and loaches 25

• Bristlenose pleco Ancistrus cf. cirrhosus 13 cm · beginner
• Bronze cory Osteogaster aenea 7 cm · group of 6+ · beginner
• Pictus catfish Pimelodus pictus 11 cm · group of 4+ · beginner
• Otocinclus Otocinclus vittatus 5 cm · group of 6+ · intermediate
• Panda cory Corydoras panda 5 cm · group of 6+ · intermediate
• Siamese algae eater Crossocheilus langei 15 cm · group of 5+ · intermediate
• Sterbai cory Corydoras sterbai 6.5 cm · group of 6+ · intermediate
• Kuhli loach Pangio kuhlii 10 cm · group of 6+ · intermediate
• Peppered cory Corydoras paleatus 7 cm · group of 6+ · beginner
• Pygmy cory Corydoras pygmaeus 2.5 cm · group of 8+ · beginner
• Rainbow shark Epalzeorhynchos frenatum 15 cm · beginner
• Striped Raphael catfish Platydoras armatulus 20 cm · beginner
• Red-tail black shark Epalzeorhynchos bicolor 13 cm · intermediate
• Salt and pepper cory Corydoras habrosus 3.5 cm · group of 8+ · beginner
• Clown loach Chromobotia macracanthus 30 cm · group of 5+ · intermediate
• Cuckoo catfish Synodontis petricola 12 cm · group of 4+ · beginner
• Glass catfish Kryptopterus vitreolus 8 cm · group of 6+ · intermediate
• Julii cory Corydoras julii 5 cm · group of 6+ · beginner
• Yoyo loach Botia almorhae 12 cm · group of 5+ · intermediate
• Clown pleco Panaqolus maccus 8 cm · beginner
• Dwarf chain loach Ambastaia sidthimunki 5 cm · group of 6+ · intermediate
• Hillstream loach Sewellia lineolata 6 cm · group of 3+ · intermediate
• Zebra loach Botia striata 8 cm · group of 5+ · beginner
• Banjo catfish Bunocephalus coracoideus 12 cm · beginner
• Common pleco Pterygoplichthys spp. / Hypostomus plecostomus 50 cm · intermediate

Cichlids 24

• Angelfish Pterophyllum scalare 15 cm · intermediate
• Blood parrot cichlid Hybrid: Amphilophus citrinellus × Vieja melanurus 20 cm · beginner
• German blue ram Mikrogeophagus ramirezi 5 cm · intermediate
• Peacock cichlid Aulonocara spp. 14 cm · intermediate
• Yellow lab Labidochromis caeruleus 10 cm · beginner
• Agassiz's dwarf cichlid Apistogramma agassizii 8 cm · intermediate
• Discus Symphysodon aequifasciatus 20 cm · advanced
• Kribensis Pelvicachromis pulcher 10 cm · beginner
• Severum Heros efasciatus 25 cm · intermediate
• Bolivian ram Mikrogeophagus altispinosus 9 cm · beginner
• Cockatoo cichlid Apistogramma cacatuoides 8 cm · intermediate
• Demasoni Chindongo demasoni 8 cm · intermediate
• Electric blue acara Andinoacara pulcher 15 cm · intermediate
• Jack Dempsey Rocio octofasciata 25 cm · intermediate
• Oscar Astronotus ocellatus 35 cm · intermediate
• Red zebra Maylandia estherae 13 cm · intermediate
• Convict cichlid Amatitlania nigrofasciata 13 cm · beginner
• Firemouth cichlid Thorichthys meeki 15 cm · beginner
• Frontosa Cyphotilapia frontosa 30 cm · intermediate
• Green terror Andinoacara rivulatus 25 cm · intermediate
• Keyhole cichlid Cleithracara maronii 12 cm · beginner
• Multi shell dweller Neolamprologus multifasciatus 4 cm · beginner
• Jewel cichlid Hemichromis bimaculatus 15 cm · intermediate
• Maingano Melanochromis cyaneorhabdos 10 cm · intermediate

Gouramis and bettas 7

• Betta Betta splendens 7 cm · beginner
• Dwarf gourami Trichogaster lalius 8 cm · intermediate
• Pearl gourami Trichopodus leerii 12 cm · beginner
• Honey gourami Trichogaster chuna 5 cm · beginner
• Three-spot gourami Trichopodus trichopterus 15 cm · beginner
• Sparkling gourami Trichopsis pumila 4 cm · group of 5+ · intermediate
• Paradise fish Macropodus opercularis 10 cm · beginner · pond zones 6-11

Killifish 4

• Clown killifish Epiplatys annulatus 3.5 cm · group of 8+ · intermediate
• Golden wonder killifish Aplocheilus lineatus 10 cm · intermediate
• Norman's lampeye Poropanchax normani 4 cm · group of 8+ · intermediate
• Blue panchax Aplocheilus panchax 9 cm · beginner

Oddballs and specialty 11

• Common goldfish Carassius auratus 30 cm · group of 2+ · intermediate · pond zones 3-11
• Fancy goldfish Carassius auratus 20 cm · intermediate
• Axolotl Ambystoma mexicanum 25 cm · intermediate
• Pea puffer Carinotetraodon travancoricus 2.5 cm · intermediate
• Elephant nose fish Gnathonemus petersii 22 cm · advanced
• African dwarf frog Hymenochirus boettgeri 5 cm · intermediate
• Rope fish Erpetoichthys calabaricus 37 cm · intermediate
• Scarlet badis Dario dario 2 cm · intermediate
• Senegal bichir Polypterus senegalus 35 cm · intermediate
• Weather loach Misgurnus anguillicaudatus 20 cm · group of 3+ · beginner · pond zones 3-10
• African butterfly fish Pantodon buchholzi 12 cm · intermediate

Shrimp and snails 13

• Cherry shrimp Neocaridina davidi 3 cm · beginner
• Amano shrimp Caridina multidentata 5 cm · beginner
• Nerite snail Neritina natalensis 2.5 cm · beginner
• Mystery snail Pomacea bridgesii 5 cm · beginner
• Blue dream shrimp Neocaridina davidi 3 cm · group of 10+ · beginner
• Crystal red shrimp Caridina cantonensis 3 cm · group of 10+ · advanced
• Assassin snail Anentome helena 2.5 cm · intermediate
• Bamboo shrimp Atyopsis moluccensis 10 cm · intermediate
• Ghost shrimp Palaemonetes paludosus 4 cm · beginner
• Malaysian trumpet snail Melanoides tuberculata 2.5 cm · beginner
• Vampire shrimp Atya gabonensis 12 cm · intermediate
• Ramshorn snail Planorbella duryi 2.5 cm · beginner
• Thai micro crab Limnopilos naiyanetri 1 cm · intermediate