Genus Paracheirodon

Scarlet characin - The cardinal tetra, Paracheirodon axelrodi, is a freshwater fish of the characin family of order Characiformes.

 
 

Piaba - The Neon Tetra has a light-blue back over a silver-white abdomen.

 
 

Green neon tetra - This fish is similar in appearance to the closely-related and better-known neon tetra, but it is slightly smaller and its red patch is less pronounced, while the blue-green areas of the upper body are more brilliant.

Order : Characiformes
Family : Characidae
Genus : Paracheirodon