Coral Red Pencilfish (Nannostomus mortenthaleri)


One of the most strikingly beautiful species of pencilfish, the Coral Red Pencil originates from the soft, acidic waters of the upper Rio Nanay in the Peruvian Amazon. A schooling fish, they are best kept in groups of 5 or more as they will display the best color in the presence of a group. In the aquarium, they make stunning display fish, and are both hardy and active. Feeding a diet high in red color enhancers (like astaxanthin or other carotenoids) will help ensure they maintain their brightest colors.


Coral Red Pencilfish (Nannostomus mortenthaleri)

Origin: Wild Peru
Locale: Upper Rio Nanay
Diet: Omnivore and micropredator, will accept most frozen and prepared foods
Adult Size: 1.5″
Recommended Tank Size: 20 gallons
Compatibility: Peaceful towards most tankmates but may nip at slower moving, long finned species

Preferred Water Parameters
pH:                          6.5 – 7.5
Temp:                     76-82F
Ammonia:              0ppm
Nitrite:                    0ppm
Nitrate:                  <30ppm