Truite arc-en-ciel is the French for "Rainbow Trout", a kind of fish. Its Latin name is "Onchorynchus mykiss" and comes from family Salmonidae, Rainbow Trout is one of the most beautiful fish to catch, it has iridiscent pinkish markings on its side. Arc en ciel is native to North America, but it has able to acclimatize to European rivers, but in Europe they are mostly farmed. Truite arc-en-ciel is also called Arc en ciel.