"swimmeret." YourDictionary, n.d. Web. 15 January 2019. <https://www.yourdictionary.com/swimmeret>.
swimmeret. (n.d.). Retrieved January 15th, 2019, from https://www.yourdictionary.com/swimmeret
One of the paired abdominal appendages of certain aquatic crustaceans, such as shrimp, lobsters, and isopods. Swimmerets are normally found on the first five abdominal segments and typically terminate in paired oarlike branches. They function primarily for carrying the eggs in females and are usually adapted for swimming. Also called pleopod
The rami may be flattened for swimming, when it is " a bi-ramose swimmeret," or both or only one may be filiform and finely annulate; this is the form often presented by the antennae of Crustacea, and rarely by prae-oral appendages in other Arthropods.