Jellyfish are cnidarians, a phylum which also includes corals and sea anemones. Jellyfish are a specific lifecycle stage of medusozoans (their own subphylum), while corals and sea anemones are anthozoans (another subphylum of Cnidaria).
So yup, they are polyps before sexual maturity. And you'll find they're more closely related to corals than they are to members of any other phylum.
Edit: I highly recommend that anyone who wants to get lost in the world of marine invertebrates check out WoRMS and then follow along in parallel on Wikipedia as you navigate the tree.
I disagree, time should flow left to right and by the nature of the egg it starts with top-to-bottom. so you have to start on the left, go to the bottom, keep going right, then the jellyfish rises so go back to top and then complete the circle
In stasis, it bends but won't break us
Aurelia, majestic as a lion's roar embodies her
Terranean, threaten and shield us
Endanger, recoil and rewind the tapes
She's born again
[...]
Medusa, a haunting allure
Elusive ectoplasmic residue
She'll dance for you
Inducing hydro-cosmic dreams in you
Of eternal blue
I hate mushrooms with a passion tbh, not just the way they taste, but even seeing them growing in the wild grosses me out. Disgusting things, I'd eat bugs before resorting to eating mushrooms.
the more you learn about how different species work the more your current worldview absolutely crumbles into dust and you see reality for the lawless mess that it is.
Barnacles are crustaceans, if you slice one in half you see that it's a fucked up deformed crayfish sitting inside the shell.
They also track sunlight so you can predict where they will be at certain times in areas with shade. Example: more likely to be closer to eastern shores in the mornings, further out at night.