Remember the five classes of vertebrates 1
The way to remember the five sub-groups of vertebrates is to think of the different types of skin coverings.
Thinking of:
Fur
Feathers
Dry scales
Wet scales
Moist skin
brings to mind the different sub-categories:
Fur = mammal
Feathers = bird
Dry scales = reptile
Wet scales = fish
Moist skin = amphibian