Paracheirodon simulans is mainly found in black water rivers of the South American tropics. They have been found in northwest Brazil in the River Negro to Colombia and Venezuela in the upper Orinoco River basin. Temperatures in these waters range from 72 to 82 degrees F. Because these jungle waters are typically shaded by overgrown trees, when keeping green neon tetras in captivity it is best to duplicate this natural shading by making the sides and bottoms of the aquarium dark.
Habitat Regions: tropical ; freshwater
Terrestrial Biomes: rainforest
Aquatic Biomes: pelagic ; rivers and streams
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