Despite humanity's search in the stars for alien life, one of the most "alien" creatures on the planet are whales. So, naturally, the idea of "space whales" can be found all over science fiction, from Doctor Who to Star Wars. However, the series premiere episodes of Ahsoka suggest the purrgil are far more powerful than anyone expected. The revelation they took Grand Admiral Thrawn and Ezra Bridger to a different galaxy is a huge one, at least for Star Wars space-whale lore.
Source：https://www.cbr.com/ahsoka-purrgil-more-powerful-than-expected/
