U. marina is about 8 millimetres (0.3 in) long, crescent-shaped and a yellowish-white colour. It is laterally compressed and normally lies on one side. The head is fused with the thorax and bears two unequal sized See more

The back three legs of U. marina have flattened joints and are used for digging and it can quickly disappear into the substrate. It is often … See more

U. marina occurs off the coasts of northwest Europe. Its range includes the North Sea, the English Channel and the Atlantic Ocean from … See more

U. marina becomes sexually mature at about five months old and may live for a year. The sexes are distinct and breeding takes place … See more