(Nice picture, but that isn't a galley. Those would have oars. xD)

After a week and half of travel, the ship encountered a harsh storm. Kos rushed to the deck to help the crew stabilize the vessel, but soon, a greater threat emerged. Kos nearly fell when he felt the impact against the side of the ship, his bare feet sliding across the slick wood. Only his claws kept him from losing his balance as the rain and salty spray of the ocean splashed against his snout. 

"Did something hit us?!" Kos shouted. Soon, the source of the collision made itself clear as a sea serpent rose from the depths.

[img]http://orig15.deviantart.net/466d/f/2015/150/2/8/storm_serpent_by_aristodes-d8var35.jpg[/img]