Would be cool if the mantis had an uncommon variant that could use attacks similar to an irl pistol shrimp.
These attacks would stun you from a distance while also dealing some pressure related injuries. Maybe structure damage to structures as well.
(Also, If it's not too much work) For them to be effective hunters, just like their mantis buddies, they'll need to be able to turn translucent or look like a rock or something. Would be cool if the mantis could camouflage itself as other things from time to time.