Fungi are heterotrophs. Fungi are classified in their own kingdom. Fungi live in moist, shady areas. Some species of fungi live and grow on other living things. They are called parasites.
Parasites are organisms that obtain their food from living organisms.
Fungi can grow on and destroy crop plants. Fungi can also attack people. Athlete's foot is an example. Some fungi can attack animals, an example is one that attacks fish. You may have seen an example of this if you have ever raised fish in a home aquarium.