👉 The term "hydrozoan" refers to a group of organisms that are characterized by their ability to form and maintain living structures from water. These structures can be both simple or complex, including gills, scales, shells, and organs. The presence of these structures is often attributed to the presence of hydrophilic (water-loving) molecules within them, which allows for movement through water. Hydrozoans are a diverse group that includes many different types of organisms such as bacteria, algae, and