Clown Rasbora (Boraras maculatus)
Boraras maculatus is a peat-swamp speck from Peninsular Malaysia and Sumatra: tiny mouth, tea-stained water, and a school that only settles when th…
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Phoenix Rasbora (Boraras merah)
Borneo peat-swamp dwarfs in tea-coloured water. Tiny mouths, leaf litter, a huge school, and chemistry that would bleach an Inle fish.
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Red Microrasbora (Microrasbora rubescens)
Inle Lake rubies. Cooler, harder, alkaline water — the opposite of Boraras peat. Captive-bred fish for a threatened plateau lake.
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Kubota's Rasbora (Microdevario kubotai)
Neon-green Ataran micros that need a crowd, powder food, and gentle planted water — not peat-swamp pH 4 and not a danio river.
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Aesculapian Danio (Danio aesculapii)
A 2009 Rakhine stream danio, still uncommon. Length, current, a closed breeding group, and no invented tetra rituals.
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Dangila Danio (Danio dangila)
Moustached foothill danios that reach 10 cm-plus. Barbels, cool monsoon flow, and a four-foot tank — not a zebra with whiskers.
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Fire Bar Danio (Devario maetaengensis)
Mae Taeng Devario in a 90 cm river, not a nano peat cube. Red bars are a current-and-condition colour.
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Barred Danio (Devario pathirana)
Sri Lankan Nilwala endemic with vertical bars. Buy captive-bred, keep a flowing school, and do not hybridise the pattern away.
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Malabar Danio (Devario malabaricus)
Western Ghats giants to 15 cm. A 120 cm cool, fast tank or a different species — shop juveniles outgrow “danio” assumptions.
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Rose Danio (Danio roseus)
Hill-stream pink and two blue lines. Turn the heater down, stretch the tank, seal the lid, and feed in the current.
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Hikari Danio (Danio tinwini)
Tiny spotted gold-ring danios from the upper Irrawaddy. Cooler water, a long box, and enough males that sparring stays theatre.
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Orange-finned Danio (Danio kyathit)
Myanmar stream danios with orange paddles. Length, current, a lid, and no zebra hybrids — not a still tetra community fish.
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Sun Tetra (Hyphessobrycon heliacus)
A 2002 Tapajós species whose males grow filamentous fins. Soft, slow, species-focused tanks — or shredded gold splinters.
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Ornate Tetra (Hyphessobrycon bentosi)
Deep-bodied Amazon tetras with white-tipped fins. Warm, planted schools; males flare, and nippers destroy the reason you bought them.
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Dwarf Pencilfish (Nannostomus marginatus)
A 3 cm lebiasinid with three stripes, a pinhead mouth, and a need for still, stained water — not a tetra and not a danio.
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Yellow Tail Congo Tetra (Alestopetersius caudalis)
An African alestid from the Congo, not a South American tetra. Gold-yellow tails need length, tannins, and a large shy school.
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Cochu's Blue Tetra (Boehlkea fredcochui)
Peru’s steel-blue schooler. Colour is a crowd effect; small groups go grey and start nipping long fins.
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Common Hatchetfish (Gasteropelecus sternicla)
Chrome river hatchets that need a sealed top and a long surface runway. Larger and hardier than marbles, still dedicated jumpers.
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Marbled Hatchetfish (Carnegiella strigata)
A 4 cm Amazon glider that lives in the surface film. Tight lid, floating food, soft blackwater, and a school — or an empty tank.
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Splash Tetra (Copella arnoldi)
Eggs glued above the waterline, a male who splashes them for hours, and a lid that must leave humid air — not a normal tetra spawn.
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Ulrey's Tetra (Hemigrammus ulreyi)
Three-lined Paraguay basin tetras that get sold as pencilfish. Cooler than Amazon characins, calmer than Buenos Aires tetras.
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Costello Tetra (Hemigrammus hyanuary)
Named for Lago Hyanuary, not a person. Green-gold iridescence and a caudal mark — not a Paracheirodon and not a dyed “green neon.”
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Garnet Tetra (Hemigrammus pulcher)
Western Amazon tetras whose black rear wedge only reads as a pattern when the school is large and the water is stained.
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Yellow Phantom Tetra (Hyphessobrycon roseus)
Guiana Shield gold with a shoulder blotch, not a bleached black phantom. Quiet midwater schools in soft, dim, planted water.
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