Innate Spellcasting The chigusa can cast the following spell, requiring no components:
Limited Amphibiousness. The chigusa can breathe air and water, but needs to be submerged in water at least once a day for 1 minute to avoid suffocating.
Multiattack. The chigusa makes three attacks: two unarmed strikes and one with its Piscine Anatomy. Unarmed Strike. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (1d4+2) bludgeoning damage. Piscine Anatomy. The chigusa has one or more of the following attack options, provided it has the appropriate anatomy: Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 4 (1d4+2) piercing damage. Poison Quills. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 3 (1d6) poison damage, and the target must succeed on a DC 12 Constitution saving throw or be poisoned 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. Tentacle. Melee Weapon Attack: +5 to hit, reach 10 ft., one target. Hit: 5 (1d6+2) bludgeoning damage, and the target is grappled (escape DC 12) if it is a Medium or smaller creature. Until this grapple ends, the sea spawn can't use this tentacle on another target.