The Worm Egg is an immobile structure that is commonly found in the bonus Worm level. It is hardly a threat by itself, but it will suddenly burst open when the Spelunker comes near, spawning three Worm Babies and a few harmless Maggots. If the Worm Egg is destroyed before it hatches, the Worm Babies inside will also be killed (though they are not included in the kill count at the end of the level).