Aquatic fungi usually have non-motile, colorless, heterotrophic, vegetative cells, but sometimes a reproductive cell is pigmented or motile. Protozoans are generally lightly-colored, flexible, motile, heterotrophic cells. Due totheir small size, protists are difficult to observe in the field. Kingdom Fungi The fungi are a diverse assemblage of organisms. Jelly, coral, disc, sponge, and gilled fungi each come in a bewildering array of forms.
All fungi have an underground web-like network of cells called mycelium.
The mycelium is the vegetative body of a fungus. Fungi are heterotrophic, but some form associations with autotrophs. Lichens are an association between a fungus and an alga. Mycorrhizae are a complex between a fungus and the roots of a higher plant. Yeast fungi produce alcohol as grape juice is converted to wine and carbon dioxide as bread dough is allowed to rise.