Lophotrichous refers to a specific arrangement of flagella on a bacterial cell. In this configuration, multiple flagella are grouped together at one or both ends of the cell. This structure allows for more efficient movement in liquid environments, as the clustered flagella can work together to propel the bacterium forward. Bacteria with a lophotrichous arrangement can be found in various environments, including soil and water. This adaptation is beneficial for their survival and mobility, enabling them to navigate toward nutrients or away from harmful substances. Examples of lophotrichous bacteria include some species of Pseudomonas and Helicobacter.