More info
Datasheet
| Minimum Tank Size | 90 litres / 23.78 US gallons |
| Maximum Size | 3.3cm / 1.30inches |
| Temperature | 22°C / 71.60°F - 28°C / 82.40°F |
| Hardness | 1.01dgH / 18ppm - 12.05dgH / 215ppm |
| pH | 4.0-7.5 |
General Description
The Three-Lined Pencilfish, scientifically known as Nannostomus Trifasciatus, is a species belonging to the Lebiasinidae family under the order Characiformes. It is a relatively peaceful fish with distinct dark lateral stripes and a slender body reaching a maximum size of 3.3cm. The species is commonly referred to as 'three-stripe', 'three-banded pencilfish', or 'princess tetra'.
Aquarium Setup
For optimal care, the Three-Lined Pencilfish thrives in a heavily planted aquarium with a dark substrate. To mimic its natural habitat, incorporate floating plants, driftwood branches, and dried leaf litter. A gentle filtration system is recommended, with air-powered sponge filters being suitable. Water parameters should be maintained at a temperature of 22-28°C, pH of 4.0-7.5, and hardness ranging from 18-215ppm. (see table).
Behaviour
The Three-Lined Pencilfish is gregarious and prefers shoaling with territorial males that may spar during daylight hours. It is best kept with peaceful tankmates of similar size to avoid aggression. In a community tank, it can coexist with smaller rasboras, barbs, and anabantoids.
Feeding and Diet
As a micropredator, the Three-Lined Pencilfish primarily feeds on tiny invertebrates and zooplankton in its natural habitat. In an aquarium, it accepts dried foods but thrives on a diet of small live and frozen foods such as Artemia nauplii and Moina.
Reproduction & Dimorphism
Adult Three-Lined Pencilfish are egg-scattering free spawners without parental care. Males are more intensely colored, especially during spawning, while females have a rounder body shape. Controlled breeding setups with dim lighting and suitable spawning substrates are recommended for successful reproduction.
Habitat and Distribution
In the wild, the Three-Lined Pencilfish inhabits sluggish tributaries, small rivers, and swampy areas of the western Amazon basin in South America. It prefers areas with dense aquatic vegetation, submerged woody structures, and leaf litter in blackwater regions. Wild populations exhibit varied color patterns depending on their habitat.
Etymology
The genus name Nannostomus is derived from Latin and Greek words meaning 'small mouth', reflecting the species' characteristic feature. The species name 'Trifasciatus' refers to the three dark lateral stripes found on the fish's body.