What could be more seamless and faceless than a U-boat surfacing and submerging, grey and impersonal?  Apologies to all naval buffs for choosing a photo of a submarine that isn’t a U-boat in the historic sense.

‘A Minke whale slid its long black back above the surface for a moment, as seamless and faceless as a U-boat.’

Source: Adam Nicolson, Sea Room: An Island Life (London: Harper Collins, 2013 (2002)), p. 128

Photo credit: tpsdave at pixabay.com