Coral Drake

Camouflage. A coral drake's coloration and shape lend to its stealth, granting the creature advantage on all Stealth checks while it's underwater.

Water Breathing. The coral drake can breathe only underwater.

Multiattack. The coral drake makes one bite attack, one claw attack, and one stinger attack.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 15 (2d10 + 4) piercing damage.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 22 (4d8 + 4) slashing damage.

Stinger. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 15 (2d10 + 4) piercing damage, and the target must succeed on a DC 15 Constitution saving throw or take 7 (2d6) poison damage at the start of each of its turns for 4 rounds. The creature can repeat the saving throw at the end of its turns, ending the effect on itself on a success.

Breath Weapon (Recharge 5-6). Coral drakes nurture their offspring in specialized throat sacs. They can pressurize these sacs to spew forth a 15-foot cone of spawn. Each target in this area takes 21 (6d6) piercing damage from thousands of tiny bites and is blinded for 1d4 rounds; a successful DC 15 Dexterity saving throw reduces the damage by half and negates the blindness.