Cuttlefish do not bluff in battle
physics.org study summary 2016
physics.org study summary 2016
... In the field, Schnell's team observed how males gradually progress from the initial low-risk visual signalling stage to the high-risk one, which entails actual physical aggression. Low-risk behavior is typically performed at a distance of more than a meter away, and seldom stimulates physical aggression in an opponent. ...