Most common fish in south America?

Corydoras aeneus (Bronze Corydoras)

Hemigrammus bleheri (Rummy Nose Tetra)

Hyphessobrycon pulchripinnis (Lemon Tetra)

Paracheirodon axelrodi (Cardinal Tetra)

Poecilia reticulata (Guppy)

Platypoecilus maculatus (Platy)

Xiphophorus hellerii (Swordtail)