(Marvel Universe#7 (fb)) - In the 19th Century, Giganto encountered the ship, the Pequod, and its crew, including Captain Ahab--who was actually Ulysses Bloodstone. During this encounter, a lighter gray, if not white, version of Giganto received the name Moby Dick.

(All-New Invaders#4 (fb) ) - <July, 1944> Sub-Mariner led several Gigantos and other sea monsters to the Crete coast to save the Invaders from the Super-Axis.

(Fantastic Four I#4) - Believing that the surface world had destroyed Atlantis, the Sub-Mariner used the Horn of Proteus to awaken Giganto, and sent it on a rampage on the surface world. Mr. Fantastic of the Fantastic Four attempted to slow it down by creating a smoke screen with his Fantasticar, but was forced to withdraw when the Human Torch tried to help, and had his flame put out by Giganto's water-spout.

In order to destroy the creature, the Thing strapped a nuclear bomb to his back, and walked inside Giganto's mouth to plant it. He was temporarily way-laid by a still-living creature Giganto had swallowed, but was successful, and Giganto was slain by the explosion.

(Spider-Man/Fantastic Four#1) - Learning Doctor Doom was sighted on the campus of Empire State University, Namor brought a towering Giganto and his Atlantean army to get his revenge on the Latverian after being crossed by Doom. The recently engaged Sue Storm pleaded with Namor to stop but he ensured her his quarrel was with Doom alone. Moments later a fierce battle erupted when Doom took control of the Human Torch's body, however with the help of Spider-Man the battle soon ended and Namor, Giganto and the Atlantean army returned to sea.

(Fantastic Four: World Greatest Comic Magazine#7, 8) - Dr. Doom had one of his servants both the Proteus Horn, awakening another Giganto, even larger than the last, as well as a large number of other sea monsters, and sending them on a course into a New England town.

    Reed Richards correctly realized this to be the offspring of Giganto. However, even the combined power of the Fantastic Four and the Avengers could not drive this massive creature off. Ultimately, Reed Richards created a sonic generator and hooked it up to the Proteus Horn--there's an explanation of how they got it, but it's not relevant here. Iron Man then flew the generator and the Horn out over the ocean, leading them all back out to sea.

(Fantastic Four: World Greatest Comic Magazine#11) - Namor summoned Giganto and an army of sea monsters to oppose Dr. Doom, who had ammassed the combined power of the Cosmic Cube, Galactus, and a few other various and sundry objects/beings of power. The immensely powerful Doom waved them all off with a sweep of his hand.

(Fantastic Four I#149)- Years later, the Sub-Mariner prepared a mock invasion of the surface world with the Inhuman Triton, as part of a plot to reunite Mr. Fantastic with his estranged wife, the Invisible Girl. Among the sea creatures he brought with him in this "invasion" was another Giganto, much smaller than the previous one, and believed by the Thing to be the earlier one's twin brother. Being much less powerful than the earlier Giganto(s), the Thing defeated this one with a single punch.

(Fantastic Four I#219) - Now controlled by Cap'N Barracuda, who had obtained the Horn of Proteus, Giganto was sent on another rampage in Manhattan to cover his men's robberies. Giganto was opposed by the Sub-Mariner and Fantastic Four, and returned to the ocean with Cap'n Barracuda's defeat.

(Amazing Spider-Man I#213) - Llyra summoned a tentacled Giganto to assist her rescue of the the Wizard from Ryker's Island prison.

(Avengers West Coast#65/2) - As part of his plot to assist his friends the Human Torch and Anne Raymond, without revealing his existence to them, Namor disguised himself as the Mad Thinker and sent a robot of Giganto after the Torch. This robot was set aflame by the Torch and ruined.

(Namor the Sub-Mariner#56) - As part of their plot to discredit Namor, Llyra and Llyron awakened Giganto with the Horn of Proteus, and sent him to destroy the UN Building. Namor attempted to stop Giganto, but was unable to prevent mass destruction, and Llyron ultimately appeared more heroic. Giganto then returned to the ocean.

(GLX-Mas Special#1 (fb)) - Squirrel Girl defeated the Atlantean Giganto.

(Fantastic Four/Iron Man: Big in Japan#1-2) - A Giganto was among the many monsters that were driven into a frenzy by the nearing arrival of the Apocalypse Beast.  As the crazed beasts rampaged through Tokyo, they were fought by the Fantastic Four and Iron Man. The Human Torch and the Thing took control of the giant robot Oteksukun and used it to defeat Giganto and Eerok. When Mr. Fantastic considered one of the monsters, Grogg, that the Fantastic Four could defeat the Apocalypse Beast, Grogg led Giganto and the others away from Japan.

(Black Panther IV#19) - A Giganto and other sea monsters were sent by Namor to watch over an uncharted island, keeping any others from interfering with the honeymoon of Ororo & T'Challa.

(Fallen Son: The Death of Captain America#2) - Gigano was summoned by Tiger Shark using the Horn of Proteus. Alongside an army of sea creatures, Giganto fought the Avengers (Ares, Black Widow, Ms. Marvel, Sentry, Wasp, Wonder Man), but was finally returned to the seas by the Sub-Mariner.

(Marvel Comics Presents II#11/3) - A Giganto was found near a shipwreck just off the Atlantic Ocean by a salvage crew and Stingray. Angered by the sudden disturbance it attacked Stingray, who tried to kill it with grenades. Unimpressed the Giganto swallowed Stingray and seemingly choked to death on him. Stingray survived.

(Namor: The First Mutant#9) - Giganto, Namor's old friend, participated in the traditional Running of the Beasts. He and the other sea monsters ran amok, but were soon subdued by Krang and his Lemurian legions. Namor wasn't happy how Krang interfered and how brutally he injured the noble creature Giganto.

(Fantastic Four V#3) - Namor gave the Future Foundation a tour of the Gigantos race grazing lands. They saw several Gigantos.

(Unbeatable Squirrel Girl I#1 - BTS) - Squirrel Girl convinced Kraven to go hunting in deep sea for creatures like the Gigantos.

(Unbeatable Squirrel Girl I#9 (fb) ) - Kraven began hunting Gigantos in the deep sea, but stopped when the costs proved too high.

(Avengers IIX#9) - With the underwater world on the brink of war, one of the Atlanteans deployed a towering Giganto to face the Avengers whom they were fighting underwater. Ghost Rider (Robbie Reyes) used his Hell Charger to burn the beasts inside after which Giganto spit the burning car out. The Giganto then retreated.

(X-Men Unlimited III#34 (fb) - BTS) - A Giganto and several other inhabitants of Monster Island came under the influence of Xemnu the Titan who proclaimed himself King of Monster Island using his psychic abilities to bend other monsters to his will.