Shinheuh

Shinheuh (God Sea Aquatic Animals) refers to the creatures that live and depend on Shinsoo. While the literal translation does mean "aquatic animal", in the view where Shinsoo is characterized as water and Shinsoo fills everything, you are technically always within the figurative sea of Shinsoo. So, it really means all creatures in the tower. This includes species like Mangdol Whales, White Steel Eel, Striped Ground Pig.