Blue Tetra Care Guide
Tyttocharax cochui · Freshwater Fish
What Blue Tetra look like
Tyttocharax cochui, commonly known as the Blue Tetra, is a diminutive species characterized by its slender, laterally compressed body, reaching a maximum adult size of approximately 1 inch (2.5 cm). The species exhibits slight sexual dimorphism, with males displaying a more pronounced blue iridescence along their flanks compared to the more subdued coloration of females. The body is translucent with a silvery-blue hue, allowing for effective camouflage in its natural habitat. Notably, this species possesses a delicate dorsal fin that is elongated and slightly pointed, contributing to its streamlined appearance. The anal fin is also elongated, while the caudal fin is forked, aiding in agile swimming. The Blue Tetra lacks prominent defensive adaptations, relying instead on its small size and schooling behavior to evade predators. Its lateral line system is well-developed, facilitating the detection of water movements in its environment.
Behavior & temperament
The Blue Tetra is a micro schooler, typically found in small, tight-knit groups within the mid-water column of its aquatic environment. This species exhibits a peaceful temperament, making it an ideal candidate for community tanks. In the wild, they inhabit slow-moving waters, often in densely vegetated areas where they can find cover. Breeding behavior is characterized by egg scattering, with females releasing eggs among plants or substrate, where they are fertilized by males. The Blue Tetra does not exhibit parental care, and the eggs hatch within a few days, depending on environmental conditions. Their social hierarchy is non-existent, as they thrive in groups without a defined pecking order, promoting a tranquil atmosphere within their schooling.
Diet & feeding
In their natural habitat, Blue Tetras are omnivorous, feeding on small invertebrates, plant matter, and detritus. In captivity, they thrive on a varied diet that includes high-quality flake food, micro-pellets, and live or frozen foods such as daphnia and brine shrimp to ensure optimal health and coloration.
Behind the name
Tyttocharax (from Greek 'tyttos' meaning 'small' and 'charax' meaning 'sharp'), cochui (origin unknown, possibly a local reference).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Blue Tetra?
AquaLens identifies your fish and plants from a photo, tracks water chemistry, and flags health issues early — free on iOS and Android.
