Bladderworm

Bladderworms were a species of parasitic worm that could infect members of the happabore species. Infections of the parasite in happabores could be treated with Happy-Bore Medicated Dewormer, a product produced by Galacti-Stok which contained Trestibinexocycline 5-Gamma, thlank oil, greel-root acid and forage products. Use of the dewormer on bladderworms was suggested in the instructions for the product.

Behind the scenes
Bladderworms were first mentioned in Star Wars: Rey's Survival Guide, a replica journal written by Jason Fry and released in 2015.