Orinoco

Water type: River
Continent: South America

Largest tributaries

Siluriformes - Catfishes

Cichliformes - Cichlids

Characiformes - Characins

Gymnotiformes - South American knifefish

Osteoglossiformes - Bony tongues

Clupeiformes - Herrings

Pleuronectiformes - Flatfishes

Myliobatiformes - Stingrays