swimmeret

One of the paired abdominal appendages of many aquatic crustaceans, such as shrimp and lobsters, that are used for swimming and in females for carrying eggs.

In Crustacea, a swimming-foot; a pleopod; an abdominal limb or appendage usually adapted for swimming, and thus distinguished from the ambulatory or chelate thoracic limbs, fitted for walking or seizing.

One of a series of flat, fringed, and usually bilobed, appendages, of which several pairs occur on the abdominal somites of many crustaceans. They are used as fins in swimming.

In decapods such as lobsters, one of the legs primarily used for swimming but also used for brooding the eggs (except in prawns) and catching food.

one of the paired abdominal appendages of certain aquatic crustaceans that function primarily for carrying the eggs in females and are usually adapted for swimming