The term SQUID DEFENSES is a reference to the defensive mechanisms of squids. Squids have two main defenses: INKS and camouflage. INKS, which are four letters long, are a dark liquid that squids release when they feel threatened. The ink is released as a cloud that obscures the squid's location and confuses predators. Camouflage is another defense mechanism used by squids, which involves changing their body color and pattern to blend in with their environment.