Bite. Melee Weapon Attack: +8 to hit, reach 10 ft, one target. Hit: 19 (4d6+5) piercing damage, and the target is grappled and restrained (escape DC 15).
Swallow. Make a bite attack against a Medium or smaller creature grappled by the glauervong mouth. If the attack hits, the target is swallowed. A swallowed creature is blind and restrained, has total cover against attacks and other effects outside the glauervong mouth, and takes 10 (3d6) acid damage at the start of each of the glauervong mouth's turns. The glauervong's gullet can hold up to two creatures at a time. If the glauervong mouth takes 20 or more damage on a single turn from a creature inside it, the glauervong must make a DC 20 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, each of which falls prone in a space within 10 ft of the glauervong mouth. If the glauervong mouth dies, a swallowed creature is no longer restrained by it and can escape from the corpse using 10 ft of movement, exiting prone.