Resurgence is an upcoming Skaarj campaign/mod for Unreal v227. It includes new maps, weapons, enemies, and features.
Unlike Skaarj pupae, young Slith such as these are deadly predators from the moment they spawn. They are just as fast in the water as fully grown Slith, and their powerful spines allow them to throw enemies across great distances (an ability Slith lose once their arms are completely developed).