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Neon tetra  The neon tetra (Paracheirodon innesi) is a
freshwater fish of the characin family (family Characidae) of
order Characiformes. The type species of its genus, it is native
to blackwater or clearwater streams in southeastern Colombia,
eastern Peru, and western Brazil, including the tributaries of
the Solimões where the water is between 20 and 26°C (68 and
79°F).[2] It is not found in the whitewater rivers of Andean
origin. Its bright colouring makes the fish visible to
conspecifics in the dark blackwater streams,[3] and is also the
main reason for its popularity among tropical fish hobbyists.
The neon tetra has a light-blue back over a silver-white
abdomen. The fish is characterized by an iridescent blue
horizontal stripe along each side of the fish from its nose to
the base of the adipose fin, and an iridescent red stripe that
begins at the middle of the body and extends posteriorly to the
base of the caudal fin. Most, if not all, w