A Crustacean Digimon that lives in the dark ocean, far underwater where light never reaches. Gusokumon is also known for its long lifespan, due to its ability to maintain its vital functions with a minimal expenditure of energy. It preys on the wounded Digimon that occasionally sink down to the depths. It hardly ever moves unless necessary.
When approached by an enemy, Gusokumon will attempt to fight them off with Brunt Claw, attacking with the sharp claws on its forelegs. Against multiple foes, it will fire organic weapons shaped like small fish from its back using Colony Torpedo. While these fish-like weapons don’t move very fast, they set off huge explosions upon contact, much like sea mines.