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
Oye, good call, I was mistaken! I looked it up and you are absolutely correct they are no relation to each other. It seems this is a long running American misnomer, as our only species of locust went extinct around a century ago. Seems a similar situation to us calling the American bison a buffalo, though those two are at least related.
You have set me straight! 😄