These enemies launch weak poison attacks that travel a good distance. Piercing weapons, such as the Gunner's Laser Beam Gun 4 and Sniper's Fire Shot 4 work wonders against them, as they can damage the whole swarm of them. Otherwise, Freeze type weapons work best against them. Although they are weak, they appear in a huge mob of 80 in the 1st screen, but only appear on that screen, as well.