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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Jump into popular groups — tetras, corys, danios, and more.
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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Buenos Aires Tetra (Hyphessobrycon anisitsi)
A La Plata schooler that likes cooler water, eats soft plants, and nips when understocked — not an Amazon neon with a different label.
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Mexican Tetra (Astyanax mexicanus)
Eyed river fish and blind cave morphs share a Latin name. Mexican tetra care splits on light, schooling, and whether the animal can even see its food.
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True Rummy-nose Tetra (Petitella bleheri)
Petitella bleheri’s crimson face is a water-quality instrument — the true rummynose of Negro blackwater, a school of ten-plus, and a nose that…
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Blue Emperor Tetra (Inpaichthys kerri)
A practical care guide to the Blue Emperor Tetra, covering aquarium size, water conditions, diet, breeding and compatible tank mates.
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Red Phantom Tetra (Hyphessobrycon sweglesi)
A practical care guide to the Red Phantom Tetra, covering aquarium size, water conditions, diet, breeding and compatible tank mates.
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Head-and-Tail-Light Tetra (Hemigrammus ocellifer)
Classic community tetras with glowing shoulder and caudal spots — hardy, peaceful, and perfect for planted mid-size aquariums.
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Silver Tip Tetra (Hasemania nana)
Small copper-bronze tetras with white-tipped fins — lively but peaceful shoalers that suit planted community and nano aquariums.
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Bloodfin Tetra (Aphyocharax anisitsi)
Silver-bodied tetras with bright blood-red fins — hardy, energetic schooling fish that prefer longer tanks and cooler room temps.
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Black Phantom Tetra (Hyphessobrycon megalopterus)
An elegant schooling tetra with smoky flanks and tall black dorsal sails on males — calm mid-water movement for planted aquariums.
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Flame Tetra (Hyphessobrycon flammeus)
A compact Brazilian tetra with fiery red rear flanks — peaceful, hardy, and ideal for colour in smaller planted community tanks.
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Green Neon Tetra (Paracheirodon simulans)
A soft-water blackwater gem with a teal-green neon stripe — smaller and more demanding than classic neons, stunning in dense plant thickets.
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Penguin Tetra (Thayeria boehlkei)
A sleek schooling tetra with a bold diagonal black stripe — peaceful, active mid-water swimmers for planted community aquariums.
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