Gelguge

 Gelguge (烈撃砲 ゲルグゲ Retsu Gekihō Geruguge?, lit."Fierce Assault Cannon Gelguge") is an enemy from Contra''. ''

Strategy Gameplay Guide
Gelguge is a turret that is affixed on a wall and is part of the defense system in the pseudo 3D levels, Base 1 and Base 2. It is first seen hiding behind a armored panel but after a few seconds it will reveal a cannon that will start shooting bullets at the player (Note: Groups of Gelguges seem to assist Shouds!). When you first enter an area Gelguges, you should either try to destroy them quickly or duck their shots.