Rock Worm

Rock Worms are subterranean animals native to Sera which are considered a delicacy by the Locust. Rock Worms are named for their hides, which are durable enough for bullets to bounce off without the creature even noticing.

Locust hunting parties often include Kantus priests which lure the Rock Worms into the open before the remaining Drones kill it, then Butchers are tasked with chopping the body into chunks for later cooking and consumption.

Biology
Rock Worms are long, hard skinned worm-like organisms that are supposedly immune to weapons. While feasting, Rock Worms can be used for protecting from others.

Behavior
According to Anya Stroud who described them as "indigenous cave creatures" that don't appear dangerous but will caurse light damage if one stands in front of their mouth and feed on a fruit called Glowbes.