A10-armed mollusk related to octopus and squid, the cuttlefish sports a flat, oblong body and narrow fins. The body is larger and fatter than a squid, making it meatier, and the ink sac is larger than that of the squid or octopus, with darker ink. One pair of arms, which retracts into pouches, is longer than the rest and is used to capture prey. Cuttlefish species range in size from 2 inches to 2 feet. When alarmed, a cuttlefish darts violently backward by expelling a water jet from its mantle cavity. Its ink was formerly used to make a brown pigment called sepia. Cuttlefish is not found in North America except as an export from Europe, where it is caught by trawling, trapping and netting and is as common as squid. It is harvested from coastal waters of the Indo-Pacific, and a larger species of cuttlefish that is marketed as sepia is found in the eastern Atlantic, from France to west Africa. Others come from Korea, Japan and Australia.