Pristella Tetra Identification Guide
Identify the Pristella Tetra by its translucent silvery body and black-white-yellow banded dorsal and anal fins.
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Key identification features
- Slender, laterally compressed, torpedo-shaped body
- Highly translucent, silvery body that allows internal organs to be faintly visible
- Distinctive banded pattern of black, white, and yellow on both the dorsal and anal fins
- Tail fin is clear to faintly yellow, without the bold banding seen on the other fins
- No lateral stripe or shoulder spot, keeping the body itself plain
- Small adult size, typically 1.5-1.75 inches (4-4.5 cm)
Common look-alikes
- X-ray Tetra is another name sometimes used interchangeably, but color-morph "Golden" or "Albino" Pristella lack the black band, showing only yellow and white on the fins.
- Glass Bloodfin Tetra shares a translucent body but has plain red-tinted fins without the black-white-yellow bands.
- Diamond Tetra is deeper-bodied and lacks both the translucency and the banded fin pattern.
Where you'll see one
Native to coastal rivers, streams, and estuarine-influenced waters of Venezuela, Guyana, and the Amazon delta region, where it tolerates slightly brackish conditions and schools over open, sandy-bottomed stretches with light vegetation.
Frequently asked questions
How do I tell a Pristella Tetra from a Glass Bloodfin Tetra?
Look at the fins: Pristella Tetras show a bold black-white-yellow band on the dorsal and anal fins, while Glass Bloodfin Tetras have plain, reddish-tinted fins without banding.
Why is the Pristella Tetra sometimes called the X-ray Tetra?
Its body is so translucent and silvery that light passes through it, faintly revealing the internal skeleton and organs, which inspired the nickname.