swimmeret
/ˈswɪməˌrɛt/
noun
- One of the small, paired appendages on the abdomen of some crustaceans, such as shrimp and lobsters, used for swimming and carrying eggs.
- Each swimmeret moves in a coordinated rhythm to propel the shrimp forward.
- The lobster uses its swimmerets to paddle through the water.
- Female crabs carry their eggs on their swimmerets until they hatch.