This page contains information regarding Star Trek: Prodigy, and thus may contain spoilers.
Brikar were large in stature and characterized by hard, rock-like skin. They were extremely strong and durable, able to withstand the impacts of blade weapons or a boulder larger than themselves falling on them without harm. Their spoken language consisted of deep growls. (PRO: "Lost and Found")
The name of the species has not been stated on-screen, but was revealed by the showrunners. 
The Brikar species originated in non-canon Star Trek novels, first appearing in Worf's First Adventure.