Cult-Spawn Sea Horror

Split Body. The creature consists of a central head and two independent tentacles.
Each tentacle has its own hit points. When a tentacle is reduced to 0 hit points, it is severed and cannot attack or move.
If the head is reduced to 0 hit points, the creature dies.
The Tentacles each hast 15 HP. And the Head 35.

Extra Amor. The Head has a Bonus an AC equal to The creatures Constitutoinmodifiers (+1).

Dual Assault. When the creature takes the Attack action, it can make two attacks, but each attack must originate from a different body part (the head or a different tentacle).
Examples:
One Tentacle Attack and one Vomit Jet
Two Tentacle Attacks, one from each tentacle
If only one body part remains, the creature can make only one attack.

Tentacle Strike (Tentacle). Melee Weapon Attack: +4 to hit, reach 10 ft., one target. Hit: 1d8 + 2 bludgeoning damage.
If both tentacles are within 5 feet of the same creature, the monster may attempt Drag Under instead of dealing damage.

Drag Under (Two Tentacles).The creature attempts to grab a creature with both tentacles and pull it into the water. The target must succeed on a DC 11 Dexterity saving throw or take 1d6 bludgeoning damage and be pulled into the water. A creature pulled underwater is grappled (escape DC 11) and restrained by the tentacles. While grappled by the monster, a creature can hold its breath for only half the normal duration.

Vomit Jet (Head). Ranged Weapon Attack: +4 to hit, range 30 ft., one target. Hit: 1d8 acid damage.
The creature spews a stream of foul seawater and bile.

Tentacle Reach. Each tentacle can extend up to 30 feet from the head.
As a Bonus Action the creature may move each tentacle up to 15 feet, as long as the tentacle remains within 30 feet of the head.