Turritopsis dohrnii

[RiverNotch]

Turritopsis dohrnii The immortal jellyfish, eh? Not something everyone will immediately visualize, with the title -- without the research, I saw the bloom as one of a generic species. And if this title is meant as a sort of association to the immortal jellyfish, well, it's too obscure to really work, and I think such an association is good enough to be more than a little secret.

jellyfish bloom,
small moons that draw her mind from the shore, This is nice.
neural stingers shooting blanks, muscle with no memory This would be fair if the stingers had a more direct effect to the metaphor -- she 'watches' the jellyfish, so I don't imagine the stinging of the jellies would affect her, and thus, this won't really relate. Unless it's established that, metaphorically, she's in the same waters, which could be clarified, and which would add a bit of nice meaning to the poem from the onset that could work. 
(she tries) This doesn't add anything

no electricity, just chemicals
smoothing her beach into glass, "Her beach"? Eh? This sudden switching of metaphors just leads to confusion here. A comparison to old age could be gleaned, sure, and that's pretty neat, but even with the earlier line, there's still no good connection between the two metaphors here. Better to associate this idea directly into the already established imagery of the jellies -- something like "oh how the jellies move down the currents / like the passing of time and youth", but of course with more style and less stereotype.
wrinkles left for oversize tees and oversized. And I don't tend to associate glass or fiery chemicals to wrinkles -- especially when it's sand, already quite wrinkly, being turned into glass, typically very smooth.
hospital smocks 

this ocean is a pool This thought simply doesn't connect -- it adds a layer that, ultimately, means nothing.
she swirls around,  This would be far better presented early on, as is noted earlier.
a toilet wasting everything, This doesn't make any sense. Is she the toilet, or is it the ocean?
a child splashing This sort of clarifies the metaphor, but not in a solid enough way to make the poem work. A more direct ending would work here, especially so if you focused on the jellyfish bloom metaphor, and removed most other clarifications and competing images.