Sepia General Characteristics | Free Biology Notes

After reading this article you will learn about Sepia General Characteristics

General Characteristics of Sepia

• It is a marine mollusc commonly called cuttle-fish
• Body is distinguished into head, neck and trunk
• Head is round and bears two large and bulging eyes, 4 pairs of small straight and forwardly directed arms and a pair of long, curved and clubbed tentacles
• Collar is reduced and is hidden beneath the trunk
• Trunk bears a thick and broad lateral fin, all along its length
• The shell is internal called “cuttlebone”
• Shell of sepia is used as a source of calcium for pet birds
• An ink gland is present which ejects ink-like fluid as a device to escape from the enemy.
• Sexes separate and development is direct
• In male the left tentacle is hectocotelyzed and is used for copulation