Bring a touch of the extraordinary to your aquarium with the Red Eye Red Tail Puffer Fish (Carinotetraodon irrubesco), a truly unique species admired for its vibrant coloration and captivating personality. Known commonly as the red puffer fish, red eye puffer, or red eye red tailed puffer, this Southeast Asian freshwater gem stands out with its bold red tail and piercing red eyes, making it a must-have for serious puffer enthusiasts and collectors of rare aquarium fish. The red eye puffer fish is native to slow-moving rivers and swamps of Sumatra and Borneo. It is instantly recognizable by its elongated body, dramatic red tail, and striking red eyes. While both males and females display this signature look, mature males often show brighter colors and more pronounced patterns, especially during courtship and breeding displays. Unlike most community fish, the red eye red tail puffer is best kept in a species-only aquarium due to its semi-aggressive, territorial nature. This red puffer fish is highly intelligent and interactive, quickly learning to recognize its keeper and displaying a range of behaviors that make it endlessly fascinating to observe. Red eye puffer fish are small to medium-sized puffers, typically reaching 2–2.5 inches (5–6.5 cm) in length. Their unique coloration, olive to brown body with a vivid red tail and ruby-red eyes, makes them a standout addition to any freshwater setup designed for specialized species. Red eye red tail puffers are known for their curious and sometimes feisty personalities. Because of their territorial nature, it is usually best to house them alone or as a carefully monitored pair in a well-decorated aquarium with plenty of hiding spots, driftwood, and aquatic plants to break up sight lines. In some cases, a single male and female can coexist, but it is essential to monitor closely for signs of aggression, especially during breeding. Community tanks are generally not suitable, as these Puffers may nip at or harass other fish, especially those with long fins or slow movement. They can, however, coexist with fast, robust, and non-aggressive tank mates in larger, heavily aquascaped tanks, but only with caution and experience. At Splashy Fish tropical fish store, our Red Eye Red Tail Puffer for sale and other Puffers for sale are tank-raised, healthy, and carefully selected for vivid coloration and optimal size. Shop online or visit our aquarium store in Virginia to discover high-quality freshwater fish for sale, betta fish for sale, freshwater shrimp for sale, aquatic plants for sale, and essential aquarium supplies. WHAT MAKES THIS FISH SPECIAL? Dramatic red tail and glowing red eyes, one of the most striking freshwater puffers Compact size (2–2.5 inches) ideal for specialized species tanks Highly intelligent, interactive, and full of personality Best suited for experienced aquarists and species-only setups RECOMMENDED TANK PARAMETERS Tank Size: Minimum 15 gallons for one puffer; larger for pairs or complex aquascapes Temperature: 75°–82°F (24°–28°C) pH: 6.5–7.5 Hardness: 5–15 dGH Filtration: Efficient, with low to moderate flow and regular maintenance CARE GUIDELINES Diet: Carnivorous. Feed a varied diet of live or frozen foods such as bloodworms, snails, shrimp, and blackworms. Crustaceans help maintain beak health. Some may accept high-quality frozen carnivore pellets. Tank Setup: Provide dense planting, driftwood, caves, and lots of visual barriers. Use soft sand or fine gravel substrate. Leaf litter can help mimic their natural habitat. Water Quality: Excellent water quality is essential; perform frequent small water changes and monitor ammonia/nitrite/nitrate levels. Social Structure: Best kept singly or as a pair with close supervision. Avoid housing with fin-nippy or slow-moving fish.