Green Neon Tetra Paracheirodon simulans

The Green Neon Tetra, also called False Neon Tetra, is native to vegetated waters of the South America's upper Orinoco and Negro river basins. It has a half to two-thirds red stripe along the rear flank together with a full luminous blue-green stripe all the way from eye to tail, unlike the related Cardinal Tetra which has a full, wide red stripe diffusing into the tail and a blue stripe which stops well short of the tail; and unlike the Neon Tetra which has a three-quarters blue stripe.

They grow only to about 2cm long and are shoaling fish that hide among vegetation; the neon luminosity allows them to see one another.