The Uutsubos resemble golden eels.
The Uutsubos only appear in Ocean Base. In gameplay, the Uutsubos lack any usage of a conventional weapon to attack the playable characters with. Instead, they reside in holes located on some walls and the floor, and will pop their head out to surprise attack the playable character when they approach their holes. Once they pop out of their holes however, the Uutsubos' heads will be vulnerable to an attack from the playable character.