One of their living distant relatives, the velvet worm, is readily eaten by invasive hedgehogs and rats. Hedgehogs are insectivores and rats will eat just about anything but the article I read mentioned they shoot “bitter, sticky slime” so yeah that probably leaves a taste. I would expect anomalocaris would have similar chemical defenses to velvet worms so expect an unfamiliar astringent or ammonaical flavor if you do someday get the chance.