X-ray tetra
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Pristella maxillaris is a species of characin in the genus Pristella, and is commonly known as the X-ray fish or X-ray tetra because of its translucent body. Wikipedia
Scientific name: Pristella maxillaris
Water temperature: 75-82°F
Class: Actinopterygii
Domain: Eukaryota
Family: Characidae
Genus: Pristella
Phylum: Chordata