This emperor's body was supposedly so hairy that to mention a goat in his presence was punishable by
This emperor's body was supposedly so hairy that to mention a goat in his presence was punishable by death. A prediction by the astrologer Trasyllus caused this emperor to cross the bay of Baiae on horseback, and his reign saw the uprising of Lentulus Gaetulicus. This man brought back seashells to signify his victory over the sea, and he was eventually murdered by (*) Cassius Chaerea. For 10 points, identify this emperor who took his name from the military sandals he wore as a child,  ruling from 37 to 41 A.D., and who once appointed his horse Incitatus a consul.
This emperor's body was supposedly so hairy that to mention a goat in his presence was punishable by death.
Caligula [accept "Gaius Julius Caesar Augustus Germanicus," I guess]