 The Iberian ribbed newt ( <unk> <unk> ) has another method of deterring aggressors . Its skin exudes a poisonous , viscous fluid and at the same time , the newt rotates its sharply pointed ribs through an angle between 27 and 92 ° , and adopts an inflated posture . This action causes the ribs to puncture the body wall , each rib protruding through an orange wart arranged in a lateral row . This may provide an aposematic signal that makes the spines more visible . When the danger has passed , the ribs retract and the skin heals . 
