Sturdy melee minions with great defense but lacking attack. Resistant to fire.
Book of Dagon
Imagine giant spiders with armour, huge sharp claws that can crack a skull like a walnut, and antennae fellers which can sense fear pheromones from thousands of miles underwater. They are the tiny tanks of the sea; shotgun blasts bounce off their shells and fire only makes the air around them smell a little better.