This enemy only exists if enough water is found in the stage. It shoots 4 mines which can bounce when they come in contact with the terrain. They are not very tough opponents on their own, and Ice, Thunder, and Freeze type weapons will make short work of this enemy. However, this enemy can be much harder to defeat in later stages due to the increasing amount of Grey Shield Bats. This is the first Eel found in the Cavern series.