The Antarean Bogg is a fictional alien species from the Animorphs series. It is the first creature Visser Three was seen morphing into in The Invasion. It is a hulking, two-legged creature with an impossibly bloated head with arm-length teeth, merged features and thick tentacles for arms. With it he killed and ate Elfangor. It can only be guessed that this creature isn't sentient, as hulking monstrosities usually are not.