[verum ago]

I had heard they were incinerated, there is nothing left of them

The air temperature would've been that high for only a few milliseconds. It surely wouldn't have done their skin and clothing any favors, but it takes time to transfer enough heat to incinerate a body, especially given the amount of heat it would take to flash the water in their tissues into steam. People killed by much higher temperature electric arc blasts aren't incinerated. They're just badly burned.

I'm not surprised they've found some remains. Outside the air in their lungs, those peoples' bodies are just as incompressible as the water outside the sub. The violence of the implosion would've certainly torn their bodies into pieces, but there would still likely be, well, pieces.

[House Atreides]

“… I’m not surprised they’ve found some remains. Outside the air in their lungs, those peoples’ bodies are just as incompressible as the water outside the sub. The violence of the implosion would’ve certainly torn their bodies into pieces, but there would still likely be, well, pieces. ”
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Thanks for the lucid post. Yes, water makes up most of the human body so, aside from the lungs and a few other places (gas in the intestines, etc) they would be compressed only as much as water can be compressed. I read that water would only be compressed a handful of percent at the depth they likely imploded. So while their bodies would have been mangled they certainly wouldn’t have been changed to a jelly-like consistency.

[steve86]

“Outside the air in their lungs, those peoples’ bodies are just as incompressible as the water outside the sub”

I guess you haven’t seen the video of the dead pig’s body shrunk to teddy bear like size with sudden compression.