X-ray fish

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X-ray fish or x-ray tetra is a name usually given to the small tetra Pristella maxillaris often referred to as Pristella riddlei in older aquarium books.^[1] Less commonly, it may also be applied to other transparent species such as glassfish and glass catfish. The name x-ray fish was supposedly given as a nickname to skeletal remains of fishes sometimes caught in fishermen's nets.^{[citation needed]}

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