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Seafolk(海人族, Kaijin-zoku / 深海族, Shinkai-zoku) were a race of beings that originated in the sea.


The Seafolk were a violent race of ocean-based creatures with a goal to take the surface of the Earth for their own and make humans their cattle. They were large humanoid creatures that possessed various aquatic animal traits such as gills, tentacles, and fins.

Several Seafolk surrounding Stinger

Even the messenger of the Seafolk had a threat level of "Wolf." Combat Seafolk have been shown to be powerful enough to lift a small truck with one arm. Several of them together were even more of a threat, with a threat level "Tiger". A group of Seafolk has been shown to be able to push a mid-ranking A-Class hero to his limits.


Hero Association Saga[]

Sea Monster Arc[]

The Seafolk begin their invasion

The first Seafolk rises from the sea and starts to head inland, but before he could even leave the water, he is destroyed by Saitama.[1] Sometime later a large wave hits the shore of J-City carrying several Seafolk with it. The Seafolk then rise from the water and begin to wreak havoc in the city. The hero Stinger shows up and saves a citizen from the grip of one of the Seafolk.[2]

Later the Seafolk are shown on a news report to have worn down the hero to his limits but were defeated, with only the Deep Sea King surviving.[3]

Other Media[]



Lord Great White, the last survivor of the Seafolk invasion eats the "King of the Lake". But afterward, Saitama quickly takes care of him.


The Sisters Who Have Too Many Things Happening[]

During the Seafolk invasion, a shrimp-like member of the species is backed into a corner by the Blizzard Group, Lily tries to go in for the kill, only for the Seafolk to attack her with Acid Spit. Fubuki appears and disperses the Acid Spit before it can hit Lily and then proceeds to kill the Seafolk.

Known Seafolk[]


Position Status
Deep Sea King King Deceased †
Urn Eel Unknown Deceased †
Lord Great White Self Proclaimed King Deceased †
Messenger of the Seafolk Messenger Deceased †

Webcomic and Manga Differences[]

In the manga and anime, the Seafolk attacked by the shore. In the webcomic, it was in the city. [4]


  • (The Seafolk messenger to humans) "We are messagers from the deep sea! Humans! Surrender the Earth to the clan of the Seafolk!"[1]


  • Lord Great White appears in the opening sequence of Season 2 of the anime.
  • According to Pig God's databook entry, there is an urban legend in which he fought 50 of the Seafolk by himself and wiped them out without leaving a trace.
  • The Seafolk appeared to be a civilization developed enough to have its own concept of politics.


  1. 1.0 1.1 One-Punch Man Manga; Chapter 23, page 4
  2. One-Punch Man Manga; Chapter 23, page 13
  3. One-Punch Man Manga; Chapter 23, page 17


Mysterious Beings
Dragon (or higher) Boros Orochi *
Demon 170,000-Year-Old Cicada Larva 170,000-Year-Old Cicada Adult Armored GorillaAwakened Cockroach Baquma Beast King Bruinado Bug God Building Booper Deep Sea King Demonic Fan Devil Long Hair *Do-S *Eyesight Face Ripper Fist Fight Djinn Free Hugger G4 G5 Game-Berus Giant Crow Grizzly Nyah Hundred-Eyes Octopus Jumping Spider Macho Daikon Mosquito Girl Rafflesidon Rhino Wrestler Royal Ripper Scaledon Senior Centipede Showerhead Sky King Subterranean King Super Mouse Surprise-Attack Plum The Great Food Tub The Three Crows Unihorn Vampire (Pureblood) 
Wolf Himawari Hotdog Messenger of the Seafolk Piggy Bancon Tongue Stretcher
Less than Wolf
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Native Tribes
Forest Tribe
Warning.png Expand to see original webcomic information. Beware of spoiler content.
Skyfolk Sky King Eagle Hawk Falcon Kite 
Subterranean People
Terror Lizard Clan Ancient King