Brown, tattered, body hair.
Unlike zezoms, zahkaz adult teeth are more curved then zezoms.
Zahkaz attack by shooting out sharp teeth straight at targets, zahkaz cannot chew on targets alive because of their curved teeth but they instead eat dead flesh.
In the demon lands, zezoms were perfect tools for Pheonix. But what the zezoms lacked at was jobs for ranged projectiles required. So Pheonix then created the zahkaz, which is a cousin of the zezoms, just with curved teeth and can shoot out projectiles.
Zahkaz just so happened to be with the zezoms and devil cats during the escape.