Multiattack

The rock roach makes two bite attacks. Alternatively, it can use Acid Spit twice.

Acid Spit

Ranged Weapon Attack: +4 to hit, range 20/60 ft., one target. Hit: 5 (1d6 + 2) acid damage, and the target takes 3 (1d6) acid damage at the start of its next turn unless the target immediately uses its reaction to wipe off the spit.

Bite

Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 9 (2d6 + 2) piercing damage.