Valacules, also known as valacules or valaculoids, are a type of microscopic, single-celled eukaryotic organisms that belong to the group of protists. They are typically characterized by their complex cellular structures and varied reproduction methods, including both asexual and sexual reproduction. Valacules are often found in aquatic environments and play significant roles in the microbial food web. Their exact classification and relationships within the protist kingdom can be complex and are a subject of ongoing research.