Multiattack. The angler worm makes two Bite attacks or one Bite attack and one Coils attack.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 9 (2d6 + 2) piercing damage plus 3 (1d6) acid damage.

Coils. Melee Weapon Attack: +4 to hit, reach 10 ft., one creature. Hit: 12 (3d6 + 2) bludgeoning damage, and the target is grappled (escape DC 13). Until this grapple ends, the target is restrained by the angler worm, it can't breathe, it takes 10 (3d6) bludgeoning damage at the start of each of the angler worm's turns, and the angler worm can't use its Coils on another target.

Ethereal Lure (Recharge 4-6). The angler worm creates an orb of faint, blue light on a point it can see within 20 feet of it. The light glows until the start of the worm's next turn. When a creature that isn't an angler worm starts its turn within 60 feet of the orb and can see the light, it must succeed on a DC 13 Wisdom saving throw or be charmed until the start of its next turn. While charmed, the creature must take the Dash action and move toward the light by the most direct route, trying to get within 5 feet of the light. It doesn't avoid opportunity attacks, but before moving into damaging terrain, such as lava or a pit, the creature can repeat the saving throw, ending the effect on itself on a success. If the charmed creature enters the worm's snares, it has disadvantage on the saving throw to avoid being restrained.