Thanks, that works, although no live Nautilus in the clip. A bit of stock footage for live Nautilus would have served the purpose, but then we wouldn't have had this thread.
After playing, the David Attenborough clip from Planet Earth came up. Remarkably, Attenborough perpetuates the erroneous assumption that Nautilus vertical movement is controlled by buoyancy change. This was debunked nearly 30 years ago.
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