From the category archives:

Tetras

Trigonostigma heteromorpha (Harlequin Rasbora/Tetra)

Family: Cyprinidae
Distribution: Trigonostigma heteromorpha, commonly known as the Harlequin Rasbora, is found in Thailand, Sumatra, Singapore and Malaysia.  It is distributed in streams and other forest swamp waters.
PH: 5.0 – 7.0
Temperature: 23°C – 28C (73 – 82F)
Hardness: 5 – 12 dH

Description: Trigonostigma heteromorpha can reach a length of 3 – 5 cm [...]

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Thayeria obliqua (Penguinfish)

Family: Characidae
Distribution: Thayeria obliqua, sometimes called the Penguinfish, is a pelagic freshwater species found in the middle Tocantins, Guapore and middle Amazon basins, in South America.  It is mostly distributed in grassy brooks and creeks, particularly those with plenty of algae and vegetation.
PH: 6.0 – 7.5
Temperature: 20°C – 28C (68 – 82F)
Hardness: 2 – [...]

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Thayeria ifati (Half-striped Penguin Tetra)

Family: Characidae
Distribution: Thayeria ifati, sometimes called the Half-striped Penguin Tetra, is a pelagic freshwater species found in the Maroni and Approuague River basins, French Guiana.  It is distributed in sandy-bottomed creeks, lentic waters and shallow, calm areas.
PH: 6.0 – 7.0
Temperature: 23°C – 28C (74 – 82F)
Hardness: 4 – 12 dH

Description: Thayeria ifati, [...]

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Aphyocharax anisitsi (Bloodfin Tetra)

Family: Characidae

Distribution: Aphyocharax anisitsi, commonly known as the Bloodfin Tetra, is distributed throughout the upper and middle layers of the Parana River basin, South America.
PH: 6.0 – 8.0
Temperature: 18 – 28°C (64 – 82°F)
Hardness: 2 – 30 dGH
Description: The smallish Bloodfin Tetra, which can reach up to 5 cm in length, has a [...]

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Alestopetersius caudalis (Yellowtail Tetra)

Family: Alestidae

Distribution: Alestopetersius caudalis, commonly known as the Yellowtail Tetra, is distributed throughout Africa’s Congo River basin.
PH: 6.5 – 8.0
Temperature: 22 – 26°C (72 – 79°F)
Hardness: 10 – 20 dH
Description: The Yellowtail Tetra can reach around 7 cm in length; females are slightly smaller than males.  This species has a pale body which [...]

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Poecilocharax weitzmani (Black Morpho Tetra)

Family: Crenuchidae
Distribution: Poecilocharax weitzmani, known also as Black Morpho Tetra, is a benthopelagic, Central American species distributed in the upper Negro, upper Solimoes, and the upper Orincoco River basins.  
PH: 5 – 6.5
Temperature: 24°C – 28°C (75 – 82F)
Hardness: 3 – 6 dH

Description: Poecilocharax weitzmani can reach up to 4 cm in length; [...]

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Prionobrama filigera (Glass Bloodfin Tetra)

Family: Characidae
Distribution: Prionobrama filigera, known commonly as Glass Bloodfin, is a pelagic South American species distributed in several parts of the Amazon River basin, including Ecuador, Peru, Bolivia, Columbia and Brazil. 
PH: 6.0 – 8.0
Temperature: 23°C – 27C (72 – 79F)
Hardness: 1 – 30 dH

Description: Prionobrama filigera can reach up to 6 cm [...]

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Corynopoma riisei (Swordtail Characin)

Family: Characidae
Distribution: Corynopoma riisei, commonly known as the Swordtail Characin, is distributed in the coastal rivers and tributaries of Trinidad, north Venezuela, and within the Villavicencio area in Columbia.
PH: 6.0 – 8.0
Temperature: 22°C – 28°C (72 – 81F)
Hardness: 1 – 15 dH

Description: Corynopoma riisei can reach a maximum of 5 cm in an [...]

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Copella arnoldi (Splash Tetra)

Family: Lebiasinidae
Distribution: Copella arnoldi, commonly known as the Splash Tetra, is a South American freshwater species distributed near the banks of slow rivers with heavy vegetation.  It is found in the lower Amazon River, Guyana and the Rio Paru.
PH: 6.0 – 8.0
Temperature: 25°C – 29°C (77 – 84F)
Hardness: 5 – 12 dH

Description: Copella [...]

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Copeina guttata (Red-Spotted Tetra)

Family: Lebiasinidae
Distribution: Copeina guttata, or Red-Spotted Tetra, is a South American freshwater species distributed in the streams and rivers of the middle Amazon River basin.
PH: 6.5 – 7.5
Temperature: 23°C – 28°C (73 – 82F)
Hardness: 8 – 12 dH

Description: Copeina guttata can grow a maximum of 8 cm in a tank environment, although they [...]

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Brycinus longipinnus (Longfin Tetra)

Family: Alestidae
Distribution: Brycinus longipinnus, commonly known as the Longfin Tetra, is a species distributed in big rivers – in the upper and lower reaches – and in estuarine zones; it is the only Brycinus species to reside in small streams and rivers.  It is found in Africa’s Atlantic border, from Gambia to the Democratic Republic [...]

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Boehlkea fredcochui (Cochu’s Blue Tetra)

Family: Characidae
Distribution: Boehlkea fredcochui, or Cochu’s Blue Tetra, is a species distributed throughout the rivers of South America, particularly Peru, Leticia, Rio Maranon. 
PH: 6.0 – 8.0
Temperature: 22°C – 26°C (72 – 79F)
Hardness: 5 – 12 dH

Description: Boehlkea fredcochui grow to around 4 cm in length and have a life expectancy of approximately [...]

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Hyphessobrycon ecuadorensis (Columbian Tetra)

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Aphyocharax anisitsi (Bloodfin Tetra)

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Hyphessobrycon heliacus (Kitty Tetra)

Hyphessobrycon heliacus (Kitty Tetra)
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Aphyocharax paraguayensis (Dawn Tetra)

Aphyocharax paraguayensis (Dawn Tetra)
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Pristella maxillaris (X-Ray Tetra)

Family: Characidae
Distribution: Pristella maxillaris, known commonly as X-ray Tetra, is a pelagic South American species distributed in several parts of the Amazon River basin, the Orinoco River, and some coastal river drainages of the Guianas.  It mostly occurs in ocean waters and in heavily vegetated swamps. 
PH: 6.0 – 8.0
Temperature: 24°C – 28C (75 [...]

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Astyanax mexicanus (Blind Cave Tetra)

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Gymnocorymbus thayeri (False Black Tetra)

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Hyphessobrycon amapaensis (Redline Amapa Tetra)

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Moenkhausia sanctaefilomenae (Red Eye Tetra)

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Hemigrammus erythrozonus (Glowlight Tetra)

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Hyphessobrycon flammeus (Flame Tetra)

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Gymnocorymbus ternetzi (Skirt Tetra)

Gymnocorymbus ternetzi (Skirt Tetra)
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Hasemania nana (Silvertip Tetra)

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Hemigrammus rodwayi (Gold Tetra)

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Micralestes occidentalis (African Redfinned Tetra)

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Poecilocharax weitzmani (Black Morpho Tetra)

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Crenuchus spilurus (Sailfin Tetra)

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Hyphessobrycon flammeus (Orange Flame Tetra)

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Hyphessobrycon megalopterus (Black Phantom Tetra)

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Thayeria boehlkei (Penguin Tetra)

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Boehlkea fredcochui (Blue Tetra)

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Moenkhausia pittieri (Diamond Tetra)

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Hyphessobrycon eques (Serpae Tetra)

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Hyphessobrycon herbertaxelrodi (Black Neon Tetra)

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Hyphessobrycon pulchripinnis (Lemon Tetra)

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Hyphessobrycon bentosi (Ornate Tetra)

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