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Tetra
Fish
Tetra is the common name of many small freshwater characiform fishes. Tetras come from Africa, Central America, and South America, belonging to the biological family Characidae and to its former subfamilies Alestidae and Lebiasinidae. Wikipedia
Tank size: 10 to 20 gallons
Class: Actinopterygii
Domain: Eukaryota
Kingdom: Animalia
Order: Characiformes
Phylum: Chordata
Representative species