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Freshwater fishGoldline Knifefish
Goldline Knifefish
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Goldline Knifefish are seldom seen in the aquarium hobby. The Goldline Knifefish, or Yellowline Knifefish, are caught in the Amazon basin near the border of Colombia and Brazil. This makes for a difficult journey to the warehouses of AquariumFish.com! Goldline Knifefish are wild and require some live foods such as black worms or feeder white clouds, but you can transition them to frozen foods. These fish project an electric field to find their prey, but cannot generate enough power to subdue their prey the way the electric eel does (electric eels are technically knife fish). Little is known about the Goldline Knifefish - it is only assumed they grow as big as Black Knifefish. Their temperament is similar, and these fish are compatible with fish that cannot fit in their mouth.
Quick Facts
| Scientific Name | Sternopygus macrurus |
| Origin | Amazon basin (Colombia and Brazil) |
| Care Level | Moderate |
| Temperament | Peaceful (eats fish that fit in its mouth) |
| Adult Size | Up to 18" or more |
| Lifespan | 10–15 years |
| Diet | Carnivore (meaty foods) |
| Water Temperature | 75–82°F |
| pH | 6.0–7.5 |
| Group Size | Single |
| Shipping Size | Approx. 10" |
Care Guide
Tank setup: Give them hiding places like large tubes or caves, dim lighting, strong filtration and a tight lid. They are most active at night.
Feeding: Feed meaty foods like frozen shrimp and bloodworms, plus sinking carnivore pellets once they learn to take them.
Tankmates: They will eat any fish that fits in their mouth. Keep them with large, peaceful fish.
Good to know: Knifefish sense their surroundings with a weak electric field, which helps them hunt in the dark.
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