👉 The term "gyrodactylidae" refers to a group of animals that are characterized by their ability to open and close their mouths involuntarily, which is known as girdling. These animals have a unique skeletal structure that allows them to open and close their jaws involuntarily, without the need for external muscles or ligaments. Gyrodactylids are also known as "girdled" animals, as they have a muscular attachment between the jawbone and the