Anostomus ternetzi

Anostomus ternetzi – Care Guide & Description

The Ternetzi Headstander (Anostomus ternetzi) is a striking, elongated freshwater fish from the Anostomidae family.

Native to South America, particularly the Orinoco and Amazon River basins, this species is closely related to the Striped Headstander (Anostomus anostomus).

It is known for its head-down swimming posture, which helps it graze on biofilm and plant matter.

Unlike its more aggressive relatives, A. ternetzi is slightly more peaceful but still requires careful stocking due to its semi-aggressive nature.

Aquarium Care & Requirements

Additional Care Tips

✅ Keep in groups of 5 or more to reduce stress and aggression.
✅ Provide plenty of swimming space—they are active and need room to move.
✅ Secure the aquarium lid as they are known jumpers.
✅ Offer a varied diet, including plant matter to prevent fin-nipping behavior.
✅ Weekly water changes (30–40%) help maintain stable conditions.