Fire Green Tetra Care Guide
Aphyocharax rathbuni · Freshwater Fish
What Fire Green Tetra look like
Aphyocharax rathbuni, commonly known as the Fire Green Tetra, exhibits a laterally compressed, fusiform body shape that reaches a maximum adult size of approximately 1.5 inches (3.8 cm). This species is characterized by its iridescent green body, which shimmers with metallic highlights, and a striking red-orange stripe that runs along the lower belly, creating a vivid two-tone appearance. The dorsal fin is typically triangular and slightly elongated, while the anal fin is rounded, contributing to its streamlined profile. The presence of a lateral line system is evident, aiding in the detection of water movements. Sexual dimorphism is subtle, with females generally appearing fuller-bodied, especially when gravid, while males tend to exhibit more vibrant coloration. Defensive adaptations include a schooling behavior that reduces individual predation risk, and their small size allows them to utilize dense aquatic vegetation for cover.
Behavior & temperament
The Fire Green Tetra is a social fish that thrives in small to medium-sized schools, exhibiting a strong tendency to form cohesive groups within their natural habitat. They predominantly inhabit the mid to upper water column in slow-moving rivers and streams in Paraguay. Their breeding behavior is characterized as an egg scatterer, where females release eggs among aquatic plants, and males fertilize them externally. This species is generally peaceful and exhibits a calm temperament, making them suitable for community tanks; however, they may display mild territoriality during breeding periods.
Diet & feeding
In the wild, the Fire Green Tetra is an omnivore, feeding on a varied diet that includes small invertebrates, plant matter, and detritus. In captivity, they require a balanced diet consisting of high-quality flake food, supplemented with live or frozen foods such as brine shrimp and daphnia to ensure optimal health and coloration.
Behind the name
Aphyocharax (from Greek 'aphyo' meaning 'to swim' and 'charax' meaning 'a kind of fish'); rathbuni (named in honor of the naturalist William Rathbun).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Fire Green Tetra?
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