Add dazzling color and lively movement to your tank with the Blue King Tetra (Boehlkea fredcochui), also known as the blue tetra, blue tetra fish, cochu's blue tetra, cochu blue tetra, or simply blue tetras. Famous for their iridescent, electric-blue bodies and active schooling behavior, Blue King Tetras are a favorite for both planted aquascapes and classic community aquariums. Their energetic nature and striking appearance instantly transform any setup into a stunning aquatic display. Blue King Tetras originate from the clear streams and tributaries of the Amazon Basin in South America. Unlike many other Tetras, their bodies shine with intense blue coloration, reflecting light beautifully and making them a true standout among freshwater fish. These Tetras are especially attractive in large groups, where their synchronized swimming and flashes of blue create a mesmerizing effect. Blue King Tetras reach an adult size of 1.5–2 inches (4–5 cm), making them perfect for both nano and medium-sized tanks. Their slender bodies, metallic-blue scales, and transparent fins give them a sleek, modern look. When kept in schools of six or more, their coloration intensifies, and their natural schooling behavior becomes more pronounced. Blue tetras are peaceful, social fish that thrive in groups and make excellent additions to community tanks. They coexist well with other small, non-aggressive fish such as Rasboras, other Tetra species, Corydoras, Otocinclus, and small peaceful Gouramis. For best results, provide dense planting, open swimming space, and subdued lighting to highlight their iridescent hues. At Splashy Fish tropical fish store, our Blue King Tetras for sale are raised with the utmost care. All our Tetras for sale are tank-bred and acclimated for home aquariums, ensuring robust health and vibrant colors. Visit our fish store online or in person at aquarium Virginia to explore our wide selection of high-quality freshwater fish for sale. We also offer betta fish for sale, freshwater shrimp for sale, aquarium plants for sale, and a variety of aquarium supplies. What You Can Expect From This Fish Striking metallic blue body and sleek, modern appearance Reaches 1.5–2 inches, ideal for nano, planted, and community tanks Active schooling fish, best kept in groups of six or more Peaceful, hardy, and suitable for beginners and experienced aquarists Compatible with most small community fish and shrimp Recommended Tank Parameters Tank Size: Minimum 15 gallons for a school Temperature: 72°–80°F (22°–27°C) pH: 6.0–7.5 Hardness: 3–12 dGH Filtration: Gentle flow, clean, well-oxygenated water Care Guidelines Diet: Omnivorous. Offer a variety of high-quality fish foods such as flakes, micro pellets, frozen, and live foods (such as daphnia, brine shrimp, bloodworms) to boost color and vitality. Tank Setup: Use fine sand or smooth gravel, dense planting, open swimming areas, and subdued lighting to enhance their blue coloration. A secure lid is recommended as tetras may jump when startled. Behavior: Social and active, schooling is essential for their health and best coloration. Keep in groups of at least six for natural, confident behavior. Tankmates: Excellent with peaceful tankmates like Rasboras, Corydoras, Otocinclus, smaller Gouramis, and dwarf shrimp. Avoid large or aggressive species. See more details on How to Care for Tetra Fish here.
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