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Superpower Wiki
"They were mostly shiny and slippery, but the ridges of their backs were scaly. Their forms vaguely suggested the anthropoid, while their heads were the heads of fish, with prodigious bulging eyes that never closed. At the sides of their necks were palpitating gills, and their long paws were webbed."
― H.P. Lovecraft's Deep Ones, The Shadow Over Innsmouth

The power to use the abilities of fish people. Variation of Cryptid Physiology and Fish Physiology. Not to be confused with Merfolk Physiology.

Also Called

  • Fish People Mimicry
  • Fishguy/Fishgal/Fishgirl Physiology
  • Fishman/Fishwoman Physiology


User with this ability either is or can transform into a fish people, category of (usually) intelligent, underwater fantasy species. While they're humanoids (one head, two arms, two legs), they don't look human; their bodies, especially the faces, have a fish-like/reptilian appearance. Their disposition/attitude towards others (especially surface folk) and ability to survive on land vary depending on the character and the series.

While Fish People are most often a pre-existing race, sometimes they are former humans (or fish) who are the result of mutation. This origin seems especially prevalent in Western Animation.





  • May have complications when transitioning from water to air.
  • Scales and skin may dry when overexposed to the Sun or artificial heat, such as fires or heaters.
  • May be vulnerable to certain diseases.

Known Users

See Also: Fish People.

  • Hyooman tribe (Adventure Time)
  • Kelpie (American Dragon: Jake Long)
  • Hamlet Fishmen (Bloodborne)
  • The Gill-Man (Creature from the Black Lagoon)
  • Deep Ones (Cthulhu Mythos)
  • Pelagic Grouper (Darkest Dungeon)
  • Pelagic Shaman (Darkest Dungeon)
  • Sea Devils (Doctor Who)
  • The Hath (Doctor Who)
  • Fishface (Dynomutt)
  • Syokoy (Filipino Mythology)
  • Abe Sapien (Hellboy)
  • Gillfolk (Hotel Transylvania)
  • Gill/Gil Moss (Kim Possible)
  • Mer-Man (Legacies)
  • Zoras (The Legend of Zelda')
  • Gill Beasts (Monolith Productions' Blood)
  • Nereid (Monster Girl Encyclopedia)
  • Sahuagin (Monster Girl Encyclopedia)
  • The Gill-Man (Monster Squad)
  • The Missing Link (Monsters vs. Aliens)
  • Uncle Gilbert (The Munsters)
  • Fishmen (One Piece)
    • Arlong
  • Seafolk (One-Punch Man)
    • Deep Sea King
  • Deep Ones (Pathfinder)
  • The Crew of the Flying Dutchman (Pirates of The Carribean)
  • Fish Mutants (Psychonauts in the Rhombus of Ruin)
  • Fishmen (Serious Sam); Cut
  • Gillmen (Skylanders)
  • Mon Calamari (Star Wars)
    • Admiral Gial Ackbar
  • Aquaphibians (Stingray)
    • King Titan
    • Surface Agent X20
  • Merpeople (Teenage Mutant Ninja Turtles)
  • Daagons (Teenage Mutant Ninja Turtles 2012 TV series)
  • Aqualandians (The Life and Times of Juniper Lee)
  • Gill-Man (The New Scooby-Doo Mysteries)
  • Undersea Gal (The Nightmare before Christmas)
  • The Asset (The Shape of Water)
  • Undyne (Undertale)
  • Rahab (The Ocean Hunter)
  • Sea monsters (Luca)
  • Mobian fishes (Archie's Sonic the Hedgehog)

Known Objects

  • Gills of Hamachi (Xiaolin Showdown)