They are found in all climatic zones, mainly on land, but also in waters, both salty and fresh.
The actual number of fungal species is very large. It is supposed that there are about 1-1.5 million species of them - four times more than seed plants.
By 2020, about 148 thousand species have been described, but about 2 thousand new ones are described every year - about 90% of the fungi still remain unknown.
