Seafoam gathers after waves crash onto a rocky coastline. The title refers to the Alfred Tennyson poem, first published in 1842:

Break, break, break,
  On thy cold gray stones, O Sea!
  And I would that my tongue could utter
  The thoughts that arise in me.

  O well for the fisherman's boy,
  That he shouts with his sister at play!
  O well for the sailor lad,
  That he sings in his boat on the bay!

  And the stately ships go on
  To their haven under the hill;
  But O for the touch of a vanish'd hand,
  And the sound of a voice that is still!

  Break, break, break,
  At the foot of thy crags, O Sea!
  But the tender grace of a day that is dead
  Will never come back to me.