Your muse is out of a boat for reasons known to them, but unknown to them they are trespassing on Yema territory, as your Muse goes father out in the water something is seen disturbing the water surface, but the ripples made it hard to see, along with the water's texture, seconds latter something bumps the boat, one after another, only a few seconds apart.
Fast facts about Yema
Yema's are related to their more aggressive cousin Yena and have more advanced body structures, they inhabit deserts near coast in large hives and their biology is extremely diverse making them difficult to deal with in combat, they could be extremely dangerous if they are attacking, due to their less aggressive and sly nature.