Nannobrycon eques (Lebiasinidae)

The hockey-stick pencilfish or brown-tailed pencilfish swims at an angle of 45°, head upwards. Fairly timid, it lives in shoals, and is often somewhat awkward to breed Size: 5 cm.

• Gnathonemus petersii
• Hemigrammus hyanuary
• Xiphophorus variatus
• Papiliochromis ramirezi
• Brachygobius xanthozona (Gobiidae)