Theoretically, this process can go on indefinitely, effectively rendering the jellyfish biologically immortal,[3][6] although in practice individuals can still die. In nature, most Turritopsis dohrnii are likely to succumb to predation or disease in the medusa stage without reverting to the polyp form.[7] --WP
Sounds like you need more wolves
Yeah, I've read about that kind of scenario several times. Sounds great.
Re-introducing beavers can also be a great idea, sometimes.