The title "Sewer Mouth" is unofficial because the subject's actual title is unknown.

Sewer Mouth is an enemy that appears in Neo Bomberman. It only appears underwater.

Sewer Mouth moves at a normal pace, constantly pursuing the player. When it comes within a three or four tile spaces of the player (not necessarily lined up), it will pause and open its mouth, and when it leaves this range it will pause to close its mouth. This does not seem to have any impact on its movement pattern.

It will harm the player on collision.