hammerhead, hammerhead shark
['horned viper, cerastes, sand viper, horned asp, Cerastes cornutus', "dragonfly, darning needle, devil's darning needle, sewing needle, snake feeder, snake doctor, mosquito hawk, skeeter hawk", 'conch', 'tusker', 'king penguin, Aptenodytes patagonica', 'sea anemone, anemone', 'hammer']