Fungus-like protists are a group of eukaryotic organisms that share characteristics with both fungi and protists. They are primarily decomposers, breaking down organic matter in their environment. These organisms can be found in damp, decaying environments and play a crucial role in nutrient cycling. There are three main types of fungus-like protists: slime molds, water molds, and downy mildews. Slime molds can exist as single cells or form multicellular structures, while water molds thrive in aquatic environments. Downy mildews are known for causing diseases in plants, impacting agriculture and ecosystems.