Coral Pukei-Pukei

Multiattack. The pukei-pukei makes one Tongue attack and one Tail attack. It can replace any one of these with its Water Glob attack.

Tongue. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 15 (2d10 + 4) bludgeoning damage.

Tail. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) bludgeoning damage.

Water Glob. Ranged Weapon Attack: +8 to hit, range 30/120 ft., one target. Hit: 10 (3d6) acid damage and the target must succeed on a DC 15 Constitution saving throw, or be afflicted with waterblight for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Water Jet - Spiral. (Recharge 5–6). The pukei-pukei flies 10 feet into the air and discharges a beam of high - pressure water from its tail that spirals out from below it out to a 45 - foot radius. Each creature in that area must make a DC 15 Constitution saving throw, taking 27 (6d8) acid damage and be afflicted with waterblight for 1 minute on a failed save, or half as much damage and isn't afflicted on a successful one. 

The pukei-pukei can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The pukei-pukei regains spent legendary actions at the start of its turn.

Kick. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) bludgeoning damage.

Water Jet - Arc (Costs 2 Actions). The pukei-pukei discharges a beam of high-pressure water from its mouth or tail in a 30-foot cone. Each creature in that area must make a DC 15 Dexterity saving throw, taking 21 (6d6) acid damage on a failed save, or half as much damage on a successful one.

Water Jet - Line (Costs 2 Actions). The pukei-pukei discharges a beam of high-pressure water from its mouth or tail in a 60-foot line that is 10 feet wide. Each creature in a line must make a DC 15 Dexterity saving throw, taking 21 (6d6) acid damage on a failed save, or half as much damage on a successful one.