Black Neon Tetra Identification Guide
Recognize a black neon tetra by its bold black horizontal stripe bordered by an iridescent silvery-green line.
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Key identification features
- Small, slender, laterally compressed body, typically under 1.5 inches long
- Bold black horizontal stripe running from behind the gills to the base of the tail
- Iridescent silvery-green to white stripe directly above the black band, catching light as the fish moves
- Translucent silvery body elsewhere, with no red coloring present anywhere
- Modest fins that are mostly clear or lightly tinted, without bold coloring
- Slightly rounded belly and a pointed snout typical of small characins
- Often forms tight, actively swimming schools that stay near mid-water depths
Common look-alikes
- Neon tetra: shows a bright blue-green stripe over a red lower body and lacks the solid black band seen in black neons
- Cardinal tetra: has red coloring running the full length of the body, unlike the black neon tetra which shows no red at all
Where you'll see one
Black neon tetras are native to blackwater streams and tributaries of the upper Paraguay River basin in Brazil, where they favor slow-moving, densely vegetated waters with soft, tannin-stained water conditions.
Frequently asked questions
How do I tell a black neon tetra from a neon tetra?
The black neon tetra has a solid black stripe with no red coloring, while the neon tetra shows a bright blue-green stripe over a red lower body.
What is the clearest feature for recognizing a black neon tetra?
Look for the bold black horizontal band bordered by a thin iridescent silvery-green line, with no red anywhere on the body.