What is the 7 levels of classification in order?

The seven levels of classification of a dolphin start with the kingdom of Animalia. The phylum is Chordata which means they have a spine. Their class is Mammalia which means they're mammals. The order is Cetacea, the suborder is Odontoceti. There are five families of dolphin - Delphinidae, Iniidae, Lipotidae, Platanistidae, and Pontoporiidae.