Leptopentacta elongata (Düben & Koren, 1846) Paraleptopentacta elongata is a species of sea cucumber in the family Cucumariidae. It is found in the northeastern Atlantic Ocean and parts of the Mediterranean Sea. It is an infaunal species, occupying a burrow in the seabed, from which its anterior and posterior ends project.

Leptopentacta elongata is a burrowing sea cucumber, which lives in U-shaped burrows. Its cylindrical body tapers at both ends with ten white, bushy tentacles at one end and the anus at the other end both protruding out into the water column. It has five distinct double rows of tube feet. The skin is thick and tough.

Leptopentacta elongata Description: A long tapering body and small white sparsely-branched tentacles are the distinctive features of this sea cucumber. The thin body has a long pointed tail and often lies curved in the sediment in a U-shape. The brown body bears five distinct rows of tube-feet.