| Name
| Description
| 1st App in Aquaman
|
| M
|
| Malignant Amoeba
| A new form of life created by Dane, Peters, and Blaine who are trying to protect all life in the oceans and land from it.
| Adventure #135 (1948)
|
| Malone, Trigger
| A criminal wanted for murder who apparently commits suicide by jumping off a dock into deep water.
| Adventure #126 (1948)
|
| Mamie
| Wife of Henry, a lighthouse keeper who rescues an amnesiac Aquaman.
| Adventure #127 (1948)
|
| Maracot Deep
| A bottomless pit that descends from the ocean floor in which Aquaman knows a sea monster dwells. Also a story by Sir Arthur Conan Doyle.
| Adventure #247 (1958)
|
| Marian
| The name of Tom Lariar's boat.
| Adventure #170 (1951)
|
| Marianne
| A ship in the Seamen's Association annual parade.
| Adventure #239 (1957)
|
| Marine Mail Delivery
| A service that delivers mail to divers and others who work at sea, owned by Jim Blake.
| Adventure #215 (1955)
|
| Marine World of Tomorrow Exhibit
| An exhibit that includes the ships of the future, a model of a bridge across the Atlantic Ocean, and the Think Machine.
| Adventure #231 (1956)
|
| Mark Windham
| See Windham, Mark.
|
|
| Mark Smith
| See Smith, Mark.
|
|
| Marlin
| The S.S.Marlin is Captain Jules Rogers ship, vying for a contract with Orienta Express.
| Adventure #168 (1951)
|
| Marlin, Butch
| The leader of the crooked gamblers who run the Lady Luck gambling ship.
| Adventure #106 (1946)
|
| Marovia
| A country sending millions in gold bullion to the United States, which is the real target of Mr. Neptune's efforts.
| Adventure #205 (1954)
|
| Marshall Museum
| A museum that loaned a movie production all their old coins to help with the authenticity of the movie.
| Adventure #178 (1952)
|
| Martin
| The personal director of a large Eastern shipping firm.
| Adventure #198 (1954)
|
| Mary Ann
| The small ship owned by Captain Fleet that gets dumped by Jumbo the whale.
| Adventure #183 (1952)
|
| Mary Ann [2]
| The freighter owned by Captain Cook.
| Adventure #210 (1955)
|
| Mary B
| A whaling schooner captained by Captain Samson, who runs the ship like a pirate ship.
| Adventure #197 (1954)
|
| Mason, Captain
| Captain Dirk in disguise, trying to utterly destroy John Preston. See also Dirk, Captain.
| Adventure #175 (1952)
|
| Mason, Jim
| The corrupt governor of Comstock, who has stolen from the treasury and abuses his power to keep his competition from being elected.
| Adventure #263 (1959)
|
| Mason, Roy
| A magazine editor who tries to blacken Aquaman's name after seeing actions he didn't understand.
| Adventure #237 (1957)
|
| Mason, Walter
| An artist who prefers to paint seascapes underwater. Aquaman assists him when one of his paintings becomes a target for thieves.
| Adventure #149 (1950)
|
| Matsu, Colonel
| A Japanese colonel whose plans keep being leaked to the Chinese resistance.
| More Fun #96 (1944)
|
| Matt's Grocery
| A business in New Venice.
| Adventure #264 (1959)
|
| Matt Cleary
| See Cleary, Matt.
|
|
| McBane
| A big-game hunters who is bored of hunting animals on land, and so creates suits and guns that allow him and a buddy to hunt undersea.
| Adventure #142 (1949)
|
| Melvin
| An annoying clown. See also Aqua-Melvin.
| Adventure #242 (1957)
|
| Menckin
| A diver who works in Pearl Valley at Luna Vaya. He's creating cultured pearls and passing them off as natural.
| Adventure #116 (1947)
|
| Merman
| A film character based on Aquaman.
| Adventure #113 (1947)
|
| Metropolitan Studios
| A company offering a $100,000 prize for pictures of the Seven Wonders of the Sea.
| Adventure #224 (1956)
|
| Mike
| The leader of a gang who has plans to take advantage of a champion swimmer.
| Adventure #181 (1952)
|
| Milo
| An ancient Atlantean who predicted disaster, but was laughed at for his worries. He perfected a giant bell jar and was able to save a number of citizens, who established a thriving colony under the waves.
| More Fun #87 (1943)
|
| Ming, Lun
| See Lun Ming.
|
|
| Mizzoo Center
| A town on the Mississippi where Chuck Finn lives.
| Adventure #136 (1949)
|
| Moby Dick II
| A whale friend of Aquaman's who rammed a ship and destroyed it.
| Adventure #213 (1955)
|
| Mohab, Captain
| A madman on a hunt for the White Whale.
| Adventure #133 (1948)
|
| Morand, Pierre
| A young Frenchman who has tried for the Channel Record in the past, and longs for another chance.
| Adventure #156 (1950)
|
| Morel, Hugo
| A famous ichthyologist who found Lisa Morel as a baby, exiled from Atlantis, and raised her as his own.
| Adventure #266 (1959)
|
| Morel, Lisa
| An Atlantean exile raised by Dr Hugo Morel. She briefly had Aquaman's abilities. She has purple eyes.
| Adventure #266 (1959)
|
| Morrell
| Seal poacher who uses electric guns to kill seals without harming the fur.
| More Fun #85 (1942)
|
| Mortar, J. P.
| A millionaire with a yacht that Black Jack decides to rob.
| Adventure #107 (1946)
|
| Moser, Bull
| A modern pirate who apparently creates a life-sized Aqua-doll to rob ships and convince police that inventor Horace Bean is behind the robberies.
| Adventure #208 (1954)
|
| Moxie, Joe
| A gang leader who buys a boat and takes his "business" to the waves.
| Adventure #195 (1953)
|
| Mr. Neptune
| See Neptune, Mr.
|
|
| Muscles
| A thug employed by Captain Jerrod.
| More Fun #84 (1942)
|
| Myron
| Aquaman's name for a sea monster that likes to copy other sea creatures antics.
| Adventure #244 (1958)
|
| Myrtle
| Phineas Pike's Giant Sea Turtle steed.
| Adventure #141 (1949)
|
