Vigilant. The abyssal eye can’t be surprised.

Water Breathing. The abyssal eye can breathe only underwater.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) piercing damage.

Evil Eye. The abyssal eye uses its eye to create an aura of fear. Each creature in a 30-foot cone must succeed on a DC 13 Wisdom saving throw or be frightened for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Go Fish. The abyssal eye uses an action leaps from the water and lands at another point in water up to 30 feet away, this path must follow a straight line. During this leap, it can make a bite attack on one target in its path. If the attack is successful, the target is grappled (escape DC 13) and carried by the abyssal eye to its landing point. Until this grapple ends, the target is restrained, and the abyssal eye can’t use its bite on another target.