So, floating on the margin of the ensuing scene, and in full sight of it, when the halfspent suction of the sunk ship reached me, I was then, but slowly, drawn towards the closing vortex.
And now, concentric circles seized the lone boat itself, and all its crew, and each floating oar, and every lance-pole, and spinning, animate and inanimate, all round and round in one vortex, carried the smallest chip of the Pequod out of sight.
There are no more uses of "vortex" in the book.
Show samples from other sources
The tunnel ended in a whirling vortex of darkness.
Cassandra Clare -- City of Heavenly Fire
What happens is the water spray creates a vortex, kind of like a hurricane.