Piscine and amphibian humanoids (people with the characteristics of fish or amphibians) have made appearances throughout mythology, cryptozoology, folklore and fiction.
Mami Wata from the mythology of the Southern Africa
Adaro from the mythology of the Solomon Islands
Atargatis from Assyrian mythology
Dagon in Semitic mythology
Ea from Babylonian mythology
Glaucus: a mortal transformed into a merman in Greek mythology
Heqet: Ancient Egyptian frog-headed goddess of fertility.
Huh: Ancient Egyptian frog-headed god whose name means "endlessness".
Iaras from Brazilian mythology
Matsya, an avatar of Vishnu in piscine form
Nommo fish-like amphibian spirits in Dogon mythology.
Oannes from Babylonian mythology
Pincoys and La Sirena chilota, princess of the sea from Chilote mythology
Rusalki from Slavic mythology
Siyokoy in Philippine mythology
Triton, the son of Poseidon
Vodyanoy from Slavic mythology
Yacuruna from the indigenous people of the Amazon
The Amabie from Japanese folklore
The ceasg in Scottish folklore
Finfolk from the folklore of Orkney
Melusine in European folklore
The Neck from Scandinavian folklore
The Ningyo from Japanese folklore
Merrows from Irish folklore
The Umibōzu from Japanese folklore
Sirens, while initially described as birdlike, were associated with mermaids in later folklore
The Bishop-fish of Poland
The fish-man of Liérganes, Spain
The Loveland Frog, of Loveland, Ohio
The sea monk of Denmark
Fiji mermaids, taxidermic hoaxes exhibited by P. T. Barnum and others
Abe Sapien and the "frog monsters" from the Hellboy comics
Argonians from Elder Scrolls
Aulbath (aka Rikuo) from the video game series, Darkstalkers, by Capcom
The Aquaphibians from the Stingray TV series
The Battletoads, from the videogame of the same name
Molly, Gil, Goby, Deema, Oona and Nonny from Bubble Guppies
Bullywug from the Dungeons & Dragons role-playing game setting
The race of Cabira (one of Chilled's henchmen) is a race of fish-like humanoids.
Crazy Frog
Deep Ones from H. P. Lovecraft's The Shadow Over Innsmouth
The Fishmen are a race of fish-like humans from the anime One Piece.
The Fish People from the radio broadcast Alexei Sayle and the Fish People
Frog-Man and the Ani-Men version of Frog-Man from Marvel Comics
The Frogman, a character from the Oz novel series
Gill-man from The Creature from the Black Lagoon
Grendel and Grendel's mother from Beowulf
Gungans from Star Wars
The harbor master, from Robert W. Chambers's 1904 short story The Harbor-Master
The titular creatures from "Humanoids from the Deep"
Hynerians from Farscape
Ichthyander from Amphibian Man by Alexander Belyayev
Kanassans are a race of fish-like humanoids from Planet Manassas. They are said to possess psychic abilities, including being able to read minds and see into the future. They featured in the special Dragon Ball Z: Bardock - The Father of Goku.
Kermit the Frog and Robin the Frog from The Muppets
Marsh-wiggles from The Chronicles of Narnia
The Little Mermaid, from the tales of Hans Christian Andersen
Mer-Man from the Masters of the Universe franchise
Michigan J. Frog, star of the Looney Tunes short One Froggy Evening and onetime mascot of The WB.
Murloc are a species of amphibious creatures which live in tribes in World of Warcraft
Namor, the Sub-Mariner from the Marvel Universe
Neptuna, the mermaid-like boss in Croc: Legend of the Gobbos
The Newts in War with the Newts by Karel Čapek
Pepe the Frog, comic character and Internet meme
The Rokea from the roleplaying game Werewolf: the Apocalypse
Sahuagin from the Dungeons & Dragons role-playing game setting
Salarians, a race in the Mass Effect series
Sea Devils from Doctor Who
Sil, from Doctor Who
In the Dragon Ball Z series, the alien race of Sūi' (one of Frieza's foot soldiers) is a race of humanoid fish-like aliens, who worked in the Galactic Frieza Army.
The TigerSharks in the cartoon series of the same name
Mr. Toad from The Wind in the Willows
Zoras from The Legend of Zelda
List of piscine and amphibian humanoids Wikipedia (Text) CC BY-SA