Skeleton On The Sea Floor -- revision

[Donald Q.]

It just appeared there one day, fused to the seabed
as one clinically depressed merges with their mattress  Not sure about 'as one', on first reading it trips a little 
or decomposes into couch cushions. Weight fell 'decomposes into couch  cushions' is fantastic
like a thick blanket over their face as they slept,
convincing the mind to keep dreaming and the lungs to surrender. The verb tenses in this line and the previous one are a bit muddling 
It just appeared there one day, like a woman I like the repetition of your opening phrase
of thirty-five suddenly seeing her feet wearing sensible heels, Also like the mundane contrasting with the surreal images you've already set up
sitting behind a desk with a picture of a husband and two kids, 
unable to breathe.

I am being nitpicky with my crit because I think there's a lot to like in this poem, it grabbed me instantly and I love the title. I would say that the second half of the poem needs to be either more abstract or more descriptive, because at the moment the images of a mid life crisis are perhaps a little generic? I do like the contrast with the first half, but I feel like the flow and imagery need to be really tight so you can really capitalise on that feeling of constriction you are working at. 
I really look forward to seeing an edit here, I enjoyed reading this !