Laocoon's Serpents

"See, a pair of serpents with huge coils, snaking over
the sea from Tenedos through the tranquil deep
(I shudder to tell it), and heading for the shore
side by side: their fronts lift high over the tide,
and their blood-red crests top the waves,
the rest of their body slides through
the ocean behind."
-Vergil, Aeneid Book 2