The Alien Caterpillar is a boss in C: The Contra Adventure.
Description[]
The Alien Caterpillars are a trio of an alien species that hover around and slither through the air. They are encountered sealed in semi-clear chambers in the Canyon, where they summon Rolling Eyeballs and Giant Centipedes to fight the player. After their summons are disposed of, they grow to a larger size and attack the player. After taking enough damage, they burst away into flames.