The Arcturidae are a family of marine isopod crustaceans in the suborder Valvifera.

Members of the family resemble woodlice and are found globally in cooler areas in shallow seas.

A flexion occurs between it and the abdomen or pleon, so from a lateral view, the front part of the animal is arched up.

The pereiopods are held close to the head, while the pleopods are attached to the pleon, making it appear no appendages on the pereon.

[2] The World Register of Marine Species includes these genera in the family:[1]