Bladderhorns are small animals of Darwin IV, and are extremely territorial. If another animal invades their territory, they will emit an eerie honk by inflating the bladder-like organs attatched to their antlers. Only the male species has so far been encountered, and it is assumed that they use their bio-luminescent bladders to scare off intruders and also to attract a mate. They live in the mountainous region of Darwin IV, and are believed to be solitary creatures.
In the TV SpecialEdit
Bladderhorns were documented by both Ike and Leo, before the latters’ demise at the hands of an Eosapian. Leo was trying to give a bladderhorn the conceptuliazition test when it was scared off by something (the Eosapien) and ran off. Later, Ike watched as two bladderhorns fought over some territory, but soon left after one won the encounter.