uropods
/ˈjʊrəpɑdz/
noun
- The last pair of abdominal appendages in crustaceans and some other arthropods, often forming part of a tail fan used for swimming or defense.
- The lobster uses its uropods to propel itself backward through the water.
- The shrimp's uropods are flattened and fringed with fine hairs.
- When threatened, the crayfish fans its uropods to create a cloud of mud.