What is SpongeBob's enemy called?

Why the stem of aquatic plants weak? What is the function dose the crop carry out in an earthworm? Do ants like dark and damp places? Can hydroelectricity be used anywhere? Do butterflies have vertebrate's? What eats rushes? What is the chemical substance entering into your body when a bee stings us? Is there a computer that will not get a virus? Do leeches go through complete metamorphosis? Is there anything smaller than a dust mite? Are hornets or wasps more dangerous? Are octupuses invertabrates? Do centipede like to climb? How many bees live in a beehive? What flowers have Charles or Charlie in it name? What is fuzzy set? Do you have to pay your rent if there are roaches? How do you find bee nest They are coming from ground but cant find nest? What is the African symbolic meaning of the mother of pearl butterfly? How many different types of invertebrates are there?