Yellow Flagtail (Semaprochilodus taeniurus) 3-5cm
Yellow Flagtail (Semaprochilodus taeniurus) brings strong schooling presence and distinctive yellow tail markings to a suitably prepared aquarium. Plan its home around adult space, water, diet and social needs rather than the current sale size.
Quick Facts
| Scientific name: | Semaprochilodus taeniurus |
|---|---|
| Product type: | large active South American characin |
| Sale size: | Approximately 3–5cm as listed |
| Sale unit: | One individual per quantity ordered unless the listing states otherwise |
| Social needs: | Active social fish requiring substantial swimming space and compatible company |
FAQ
What is the typical schooling behavior of Yellow Flagtail?
Yellow Flagtail is a social fish that thrives in groups and exhibits strong schooling behavior. It should be kept in a group of at least six to ensure natural activity and reduce stress.
What water conditions do Yellow Flagtail prefer?
Yellow Flagtail prefers warm, well-oxygenated water with a stable temperature between 24–28°C and a pH range of 6.0–7.0. Good water flow and regular maintenance are essential.
What should I feed my Yellow Flagtail?
A varied diet of high-quality flake food, frozen or live foods such as brine shrimp or daphnia is recommended to support its active lifestyle and vibrant coloration.

Tracey Gibson –
The fish are active and form a nice school. I kept six of them in a 120-liter tank with good water flow. They swim together and show bright yellow tails. Feeding them daily with flakes and occasional frozen food keeps them healthy.
Anne Powell –
They are lively and enjoy swimming in groups. The yellow tail marking is visible and attractive. I had to ensure the tank was large enough and had good filtration. They adapt well to a community setup.
Joseph Mathis –
Great addition to a South American characin setup. The schooling behavior is impressive and they stay active even in a moderately sized tank. I feed them twice a day with a mix of flakes and frozen foods.