Hunters of the Dark Sea by Mel Odom
They were the whalers of the nineteenth century, leaving home for months, nay years at a time, in search of the largest creatures of the earth. It was their job to hunt these mammoth sea dwellers for their oil and feed the trade in hopes of raising enough coin to feed their families back in port. They are the hunters of the dark sea, in search of the deadly behemoth that is their stock and trade. It is a life and death profession where even the greenest member of the crew knows the odds of survival . . . until these odds are changed by an even deadlier hunter than themselves: an unearthly predator that is now stalking them.