my theory is, nymphs is bugs,

specifically, true bugs of the order hemiptera,

instead of wriggly wormlike larvae, they have nymphs, which are more like little wingless adults,

they have tube shaped mouthparts for stabbing things and sucking the blood or sap out of them, like ly'lacs toothed mouth tube,

the nymphs often protect themselves with armour made from their own secretions, or debris, or the corpses of their victims,

and shellac bug nymphs produce shellac, which is what records used to be made out of before vinyl was invented,

yes, i am a nerd