Dwarf Pencilfish (Nannostomus marginatus) Fish Species Profile
The Dwarf Pencilfish is the smallest fish of this species. They are friendly and peaceful but can be quite timid and will hide away and refuse to eat if their tankmates are too boisterous.
They have a silver body and two black striking horizontal stripes from head to tail. They also display a distinctive red patch on the caudal fin base, between the primary and secondary dark lateral lines.
|Scientific Name||Nannostomus marginatus|
|Origins||Eastern South America|
|Aquarium Level||Middle - Top|
|Lifespan||2 - 5 years|
|Maximum Size||up to 3.5 cm|
|Temperature||75 - 79 ℉ (23.9 - 26.1 ℃)|
|PH||5.5 - 7.5|
The Dwarf Pecilfish comes from the very soft acidic backwaters, tributaries, and swamplands, in Maduni Creek, Guyana, and Suriname.
You can also find this species of pencilfish in the middle to lower Amazon Basin East of the Andes Mountains in Brazil, Peru and Columbia, where the water is almost still, shallow and crowded with thick vegetation and plenty of leaf litter.
Their natural water is stained a tea colour from the tannins in the decaying wood and leaves.
Dwarf Pencilfish will accept most foods offered to them, providing they are small enough for their tiny mouths.
Good quality granular or flake food will provide them with everything they will need. Still, these fish will be very appreciative of small frozen or live foods such as mosquito larvae, bloodworms, daphnia and baby brine shrimp.