Coralfish

Aquatic. The coralfish can only breathe underwater.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) piercing damage and the target makes a DC 11 Constitution saving throw against being petrified. On a failure the target is restrained as it begins to turn to a brightly colored statue. A lesser restoration spell ends this effect. If still restrained the creature must repeat the saving throw at the end of its next turn. On a success the effect ends. On a failure the creature is petrified for 24 hours.

Frenzy (1/Day). When attacked by a creature it can see within 20 feet, the cockatrice moves up to half its Speed and makes a bite attack against that creature.