A few more pages over and the room is suddenly filled with the smell of the sea, the rush of a sea breeze and the cold of the depths. You look at the page careful to find a shard of horn... encrusted with salt
the entry reads... The sea foam naharwal, (come up with clever celestial name). This creature found with some areas of the water plane is known for its mischievous nature. They are guardians of the sea currents. Swimming in the ocean, largely unnoticed.
Providing the waves and tides are respected, they will leave sailors alone, or even aid those in need. Earning their eyer is dangerous. Their horned heads are adept at destroying ships below the waterline and impaling unweary sailors.
While Ironclad ships are a reasonable defence, but not a perfect one. Best respect the sea, lest these guardians drag you into its depths.