Perception +4, Stealth +4
Darkvision 120 ft., passive Perception 14
Predatory Instinct. The skulker has advantage on Wisdom (Perception) checks against injured creatures.
Aquatic Hunter. The skulker has advantage on attack rolls against creatures when attacking in or from the water.
Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: (1d8+2) piercing damage. If the target is a creature, it must succeed on a DC 10 Strength saving throw or become grappled.