All the water breathers.
humanoids
semi-humanoids
mermaids and mermen
sea monsters
sea creatures
sea animals
scuba divers
fish-like robots
creatures that live in the water even if they don't breathe water.
Watercraft
Sailors and captains of seafaring ships.
The first sub-mariner king of Atlantis in DC Comics.
An alien submariner character from Marvel Comics.
A Street Shark from the cartoons and comic books.
A fish character from Disney's "Finding Nemo".
A human in a power suit that operates under the sea in the DC universe.
A shark mutated into a semi-humanoid form in DC Comics.
An Atlantean from Marvel Comics.
A shark themed character from Capcom Comics and games.
A whale monster from Marvel Comics.
A scuba diver from DC Comics.
A sub-mariner character from DC Comics.
An Atlantean from Marvel Comics.
A Street Shark from the cartoon and Archie Comics.
A gigantic sea monster from Atlantis in Marvel Comics.
An Atlantean from DC Comics.
A sub-mariner character from Marvel Comics.
A sub-mariner character from the Entity series: Captain Nauticus and the Ocean Force.
A crab character from Disney's "A Little Mermaid" cartoon movie.
A member of the Seacons who transforms into a lobster. A character from the Transformers universe.
A DC comics character from an alternate dimension where Batman was a woman and modified her DNA with Atlantean DNA to battle an invading Atlantis.
An Atlantean from Marvel Comics.
A mermaid princess from the Masters of the Universe.
A telepathic fish from the Buffy Universe.
A character that can turn itself into water from Marvel Comics.
A sub-mariner alien from Pluto in DC Comics.
An Atlantean from Marvel Comics.
A sub-mariner character from Dark Horse Comics.
Generally depicted as a giant sea monster from myths and legends.
A Tower Comics underwater character from the T.H.U.N.D.E.R. Agents series.
An Atlantean from DC Comics.
An Atlantean and vampire from Marvel Comics.
A sub-mariner character from Image Comics's Shark Man series.
Aquaman's enemies in DC Comics.
A scuba diving member of the G. I. Joe team from the G. I. Joe universe.
An Atlantean from DC Comics.
A sub-mariner alien from Marvel Comics.
A member of The Blue, a sub-mariner race from Aspen MLT comics.
A barracuda character from Disney's version of "The Little Mermaid".
A member of the Decepticons Seacons team from the Transformers universe.
An Atlantean from DC Comics.
An evolved dolphin from Marvel Comics. One of his listed powers is sub-mariner.
A mer-boy from Disney's version of "The Little Mermaid".
Though not a life form the aircraft carrier of the G> I. Joe team sails the seas that all the others on the list live in.
Though not a sub-mariner this pirate spends a lot of time on the seas. This picture is of the Disney "Peter Pan" version.
An Atlantean from DC Comics.
An Atlantean from Marvel Comics.
A fish character from the Fish Police series.
A shark with false teeth from IPC Magazines.
A Disney character that is made entirely of water.
An Atlantean from DC Comics.
An Atlantean from Marvel Comics. This character's profile page does not state that one of its powers is sub-mariner, but because of its inclusion on the list of Atlanteans and the stories showing this character is a current enemy of Namor I will add this character to my list here.
A member of the Ocean Force from Entity Comics.
A fish character from Disney's version of "The Little Mermaid".
An Atlantean from DC Comics who is not naturally a sub-mariner. This character must wear a power suit to operate under water.
An Atlantean from DC Comics.
An Atlantean from Marvel Comics.
A sub-mariner from Big Bang Comics.
A fish type Pokemon from Nintendo.
An admiral and the commanding officer of the G. I. Joe team's aircraft carrier, the USS Flag.
An Atlantean from DC Comics.
An Atlantean mutant from Marvel Comics.
A sub-mariner character from Penthouse Comix.
A monster from Loch Ness. Though not from the seas I will still add this fresh water monster to the list.
A member of the Decepticon's Seacons team from the Transformers universe.
An Atlantean from DC Comics.
An Atlantean from Marvel Comics.
A mermaid character from EC Comics.
A ship used by Danger Girl.
A character that controls water and becomes water from Dynamite Comics.
A Tritonian mermaid from DC Comics.
An Atlantean from Marvel Comics.
A member of The Blue, a sub-mariner race from Asptn MLT Comics.
A dolphin from DC Comics.
A character that uses a deep sea diving suit from the Scooby Doo/ DC Comics universe.
A sub-mariner character from DC Comics.
An Atlantean from Marvel Comics.
A sub-mariner character from Image Comics.
The giant whale the swallows Pinoccio in the Disney version of the story.
A US Coast Guard member of the G.I. Joe team. He generally pilots the G.I. Joe team hovercraft - the Killer W.H.A.L.E.
An Atlantean from DC Comics.
An Atlantean from Marvel Comics.
A sub-mariner character from Entity Comics.
A fish type of Pokemon from Nintendo's Pokemon universe.
A pirate character in the public domain.
An Atlantean from DC Comics.
An Atlantean and Ancient, another sub-mariner species, from Marvel Comics.
A sub-mariner character from Big Bang Comics.
A real ship that really sank after hitting a real iceberg. This ship has appeared in comic books.
A member of the Decepticons' Seacons team from the Transformers Universe.
An Atlantean from DC Comics.
A sub-mariner character from Marvel Comics.
A sub-mariner character from the Star Wars Universe.
An intelligent whale from DC Comics.
This Marvel Comics character can telekinetically control water, but does not appear to be a sub-mariner.
An Atlantean from DC Comics.
An Atlantean from Marvel Comics.
A sub-mariner character from Aspen MLT comics.
A giant aquatic being from the Archie Comics version of the TMNT.
A scuba diver from DC Comics.
An Atlantean from DC Comics.
