South American Needlefish (Potamorrhaphis guianensis)


An unusual freshwater species of a primarily marine family of fish, the South American Needlefish is found throughout much of the Amazon basin, where it inhabits shallow stretches of slower-moving waters, usually in areas with lots of overhanging vegetation and cover. A surface dwelling predator, they are highly adapted to feeding on small fish and insects. In the aquarium, they should be given plenty of open swimming space but will do best with some areas of surface oriented drifwood/branches or floating aquarium plants as they are easily spooked if not provided with some cover. Although at first they can be difficult to wean off live foods, over time they can be trained to accept freeze dried foods like bloodworms or krill and even floating pellets.


South American Needlefish (Potamorrhaphis guianensis)

Origin: Wild Peru
Locale: Rio Nanay
Diet: Predator and live fish eater, can be weaned onto floating prepared or freeze dried foods over time
Adult Size: 10″
Recommended Tank Size: 75 gallon
Compatibility: Predatory, but generally not aggressive towards tankmates too big to be considered a meal.

Preferred Water Parameters
pH:                          6.0  – 7.4
Temp:                     76-82F
Ammonia:              0ppm
Nitrite:                    0ppm
Nitrate:                  <30ppm