Bite

Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 17 (3d8 + 4) piercing damage plus 13 (3d8) poison damage.

Constrict

Melee Weapon Attack: +7 to hit, reach 5 ft., one creature. Hit: 14 (3d6 + 4) bludgeoning damage, and the target is grappled (escape DC 14). Until this grapple ends, the target is restrained, and the naga can't constrict another target.