This popular aquarium fish is the only species in the Pristella genus, and all specimens available in the hobby are commercially bred. In nature the Pristella Tetra inhabits the northeastern coastal waters of South America. During the dry season it lives in streams and tributaries. Then during the rainy season, it moves with the rising waters onto the savannah, where it spawns among the flooded vegetation.
The Pristella Tetra is an excellent fish for the beginner. It is extremely hardy and undemanding and not at all choosy about water type. In nature, it is found in brackish water as well as soft water. It can even withstand very hard water, though it will do best in soft. A dark substrate and subdued lighting will show off the X-Ray Fish at its best and enhance its colors. However, this tetra will not get its full color in hard water or under bright light.
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