👉 Planorbidae is a family of small, flat-bodied crustaceans in the order Arthropoda. They are primarily marine animals and have a wide range of habitats, from warm tropical waters to cold Arctic seas. The name "planorbidae" comes from the Latin word "planor," which means "plan" or "order," and "orbidae," which means "ostracods." Planorbids are known for their unique characteristics such as a long, streamlined