Shining Pencilfish – Nannostomus nitidus
The Shining Pencilfish (Nannostomus nitidus) is a delicate, peaceful nano fish known for its slender body, subtle iridescent shine, and graceful top-dwelling behavior. This elegant pencilfish is a beautiful choice for planted aquariums, nano tanks, and natural aquascapes.
Shining Pencilfish add gentle movement to the upper levels of the aquarium without overwhelming calmer tankmates. Their refined appearance, peaceful nature, and quiet swimming style make them ideal for hobbyists who enjoy natural, tranquil freshwater setups.
Key Features
- Slender body with subtle iridescent shine
- Peaceful top-dwelling nano fish
- Great for planted aquariums and aquascapes
- Calm behavior for peaceful community tanks
- Elegant movement near the upper levels of the aquarium
- Best kept in groups of 6–10 or more
Care Guide
- Scientific Name: Nannostomus nitidus
- Common Name: Shining Pencilfish
- Care Level: Easy to moderate
- Temperament: Peaceful
- Adult Size: Approximately 1.5–2 inches
- Size at Sale: Approximately 0.75–1 inch
- Minimum Tank Size: 10–20 gallons or larger recommended
- Tank Level: Top to upper-middle
- Water Temperature: 72–80°F
- pH Range: 6.0–7.5
- Diet: Omnivore
Why Choose Shining Pencilfish?
Shining Pencilfish are a great choice for aquarists who want subtle beauty instead of bold, flashy color. Their slim shape, soft shimmer, and calm movement create a refined look that works especially well in planted aquariums and aquascapes.
Because they are peaceful and gentle, Shining Pencilfish are best kept with calm tankmates that will not outcompete them for food. A proper group helps them feel secure and encourages natural behavior.
Ideal Tank Setup
Shining Pencilfish do best in a mature, stable aquarium with live plants, floating plants, driftwood, and gentle filtration. They appreciate cover near the surface, open swimming space, and calm water movement.
Darker substrate, natural decor, and planted areas can help them feel secure while enhancing their subtle iridescent appearance. A secure lid is recommended because top-dwelling fish may jump.
Compatible Tankmates
- Ember Tetras
- Green Neon Tetras
- Small peaceful rasboras
- Other peaceful pencilfish
- Corydoras catfish
- Otocinclus
- Shrimp with proper cover
- Small peaceful snails
Diet & Feeding
Shining Pencilfish have small mouths and should be offered small, appropriately sized foods. Feed quality micro pellets, fine flakes, crushed flakes, frozen baby brine shrimp, daphnia, cyclops, and small live foods when available.
A varied diet helps support healthy activity, condition, and subtle coloration. Feed small portions that the group can consume quickly.
Care Tips
- Keep in groups of 6–10 or more
- Provide live plants and gentle cover
- Use calm, peaceful tankmates
- Maintain clean, stable aquarium water
- Use darker substrate or backgrounds for best appearance
- Use a secure lid since they may jump
Frequently Asked Questions
Are Shining Pencilfish good for planted tanks?
Yes. Shining Pencilfish are excellent for planted aquariums and aquascapes, where their subtle shimmer and graceful movement look natural and refined.
How many Shining Pencilfish should I keep together?
Keep them in groups of at least 6–10 or more for best confidence, social behavior, and reduced stress.
Are Shining Pencilfish aggressive?
No. They are very peaceful fish and do best with other calm community species.
What part of the tank do Shining Pencilfish use?
They primarily use the top to upper-middle portion of the aquarium.
How big do Shining Pencilfish get?
They typically reach approximately 1.5–2 inches as adults.
What do Shining Pencilfish eat?
They eat micro pellets, fine flakes, frozen baby brine shrimp, daphnia, cyclops, and other small foods.
Are these fish available for shipping?
No. Live fish are available for in-store purchase or local pickup only at Tropical Treasures Wyo in Cheyenne, Wyoming.
Available at Tropical Treasures Wyo
Shining Pencilfish are peaceful top-dwelling nano fish for planted aquariums, aquascapes, and calm freshwater community tanks. Visit Tropical Treasures Wyo in Cheyenne, Wyoming, to shop pencilfish, nano fish, freshwater fish, shrimp, snails, live aquarium plants, fish food, filtration supplies, and aquarium care products. Live livestock is available for in-store purchase or local pickup only.
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