Lorjuk (Solen grandis) from Surabaya-Madura aquatic, in East Java

Lorjuk including a type of marine animals whose families have shellfish. Lorjuk is another term for shellfish knife widely used by most people in East Java. Until now, not currently known to exactly where the emergence of the term "lorjuk". Most likely lorjuk become popular because it was taken from the name local clam knife itself is "lorjuk" which are found in East Java (Kenjeran Coast Surabaya, Sidoarjo and Aquatic Kwanyar, Aquatic Madura).

The latin name's of lorjuk is Solen grandis. Based on the classification, lorjuk classified in Phylum Mollusca, Class bivalves, and the Order Veneroida Family Solenidae. Judging from the morphology, lorjuk have a long shell with two parallel sides, small body length, one end tapered body shaped like a blade, stick and stood upright on the sandy beach. Sometimes lorjuk pulled his body into the sand to hide from the enemy. In some countries, lorjuk also known by a some name like "razor clam "or" jacknife ", because its characteristics are identical with knife

Lorjuk arrest process quite difficult because it requires special equipment and shrewdness fishermen. Until now, techniques and gear used are still traditional in nature. Cycle lorjuk season generally 1-2 months so that in 1 year there were 3 times a season. Season factor is very influential on the catch of fishermen. In fact this time the number has declined due to the arrest lorjuk performed continuously.