What physical trait defines the X-Ray Tetra, Pristella maxillaris, in the aquarium hobby?
Answer
Near-invisibility due to a translucent body
The defining characteristic of the X-Ray Tetra is its remarkable transparency. This quality means that much of its skeletal structure and internal organs are visible through the skin, giving it the common name because it resembles an X-ray image. This lack of pigmentation in the main body mass serves as its primary means of blending into its natural environment, setting it apart from most other vividly colored tetras.
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X-Ray (Pristella) Tetra Care and Breeding - YouTube
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