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Invertebrate Index

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Classification of invertebrates note 

This index is for insects, arachnids, worms, sponges and every other type of creature without a backbone. See The Other Wiki for more information on this category of animal.

Arachnid tropes go under Arachnid Tropes and insect tropes go under Insect Index.


  • Antlion Monster: A monster that hunts by waiting for its prey at the bottom of a pit.
  • Big Creepy-Crawlies: Arthropods of unnaturally large size.
  • Bug Catching: Catching arthropods for fun and profit.
  • Bugs Herald Evil: The presence of arthropods as a signal that something worse is coming.
  • Bug War: A war against insect-like creatures from outer space.
  • Bug Works: An index of works about insects and other bugs such as arachnids, centipedes, gastropods, etc.
  • Cartoon Bug-Sprayer: A type of bug-sprayer with a push-handle and a cylindrical tank mounted crosswise to its nozzle.
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  • Clam Trap: Giant clams that snap closed on people who approach them, like living beartraps.
  • Creepy Centipedes: Centipedes portrayed as frightening and unnerving monsters.
  • Electric Jellyfish: Jellyfish that shock people with electricity instead of being venomous.
  • Four-Legged Insect: An arthropod portrayed with fewer legs than it should have.
  • Friend to Bugs: A character who genuinely loves creepy-crawlies.
  • Giant Enemy Crab: Outsized, dangerous crabs.
  • Hive Caste System: Arthropods or arthropod-like creatures living in a rigidly ordered caste system with ranks based on innate biology.
  • Instant Leech: Just Fall in Water!: Fall in suspicious water, emerge covered in leeches.
  • Literal Bookworm: Either actual worms or wormy bugs that eat books, read books, or read books by eating them.
  • Penny-Pinching Crab: Crabs portrayed as stingy, greedy and money-obsessed.
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  • Perplexing Pearl Production: Pearls that are created quickly and without flaws, and by any sort of bivalve.
  • Pitiful Worms: Insulting a person by comparing them to worms or other puny little critters.
  • Removable Shell: Examples where mollusks are able to shuck off their shell and put it back on at whim.
  • Sand Worm: Enormous, wormlike beasts that tunnel unseen underground to attack prey walking above.
  • Somewhere, an Entomologist Is Crying: Inaccurate and badly researched portrayals of insects.
  • Speedy Snail: Slow animals, such as snails, portrayed as fast and agile.
  • Worm in an Apple: Worms are strongly associated with apples, usually as a sight gag.
  • The Worm That Walks: Creatures that are actually masses of smaller things, usually invertebrates, moving as a single entity.


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