The plural of moose is moose. The singular form of moose is the same as the plural form. This type of noun, which does not change from the singular to plural form, is called an invariant.
A moose is a large animal found in North America, Europe and Asia. There are a variety of subspecies of moose across the planet. Moose are the largest member of the deer family and are related to both deer and elk. The male moose has large antlers and is referred to as a "bull," while a female moose is a "cow." A young moose is called a "calf."