Armor Class 11 (natural armor)
Hit Points 32 (5d8 + 10)
Speed 20 ft., swim 30 ft.
Senses darkvision 120 ft., passive Perception 10
Languages understands Aquan and Common but can't speak
Challenge 1
Limited Amphibiousness. The sea spawn can breathe air and water, but needs to be submerged in the sea at least once a day for 1 minute to avoid suffocating.
Multiattack. The sea spawn 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 sea spawn has one or more of the following attack options, provided it has the appropriate anatomy:
Volo's Guide to Monsters, p. 189