 Another common behaviour , primarily seen in males , is dubbed " spread arms " , in which the squid will slightly tilt its body forward , head down and arms spread widely and raised above . The mantle is darkened . This behaviour is exhibited mostly when the squids are chasing or following another individual . It is thought to be a signal of reproductive arousal or aggression , similar to the " zebra display " behaviour of Sepioteuthis sepioidea , the " intense zebra display " behaviour of Sepia officinalis , and the " lateral display " of Loligo <unk> . Females will also sometimes use this display to rebuff courting males . 
