swimmeret

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swimmeret

(swĭm′ə-rĕt′, swĭm′ə-rĕt′)
n.
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. Also called pleopod.

swimmeret

any of the small paired appendages on the abdomen of crustaceans, used for locomotion or reproduction.
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The DAA supplies hemolymph to the abdominal muscles and swimmerets through the segmental pairs of LAAs, and to the gut and gonads through a perfusion of small-diameter vessels that exit the ventrolateral wall of the DAA.
In the abdomen, the slow rhythmic opening and closing of the LAAVs may serve to maintain a low basal hemolymph flow to the abdomen and swimmerets during periods of locomotory inactivity and of increased digestive activity when it is predicted that the LAAVs would be closed.
In decapod crustaceans, the DAA supplies blood to the abdominal positioning muscles and swimmeret muscles via the LAAs, and to the gut through many small arterioles that arise from the ventral wall of the DAA.
All lobsters have small "swimmerets" on their belly where the tail meets the torso.
While an animal was walking, the swimmerets beat and the abdomen and chelipeds were held slightly elevated and extended.