Wasn't the Marminator either a monster in the Labyrinth that was killed by Theseus or the Union waship that fought the Merrimac (a/k/a Virginia) at Hampton Roads?

Closeup: the quiet waters of Hampton Roads. Pull back to see happy folks at play, waterskiiing, fishing, fooling around, messing about in boats. Swing right to view the USS Ronald Reagan at anchor in the Naval Yard.

SFX: bubbles from the water, growing larger and more frequent. Suddenly, a monstrous head breaks the surface and with one more mighty bubble a fearsome mouth opens and, water and slime dripping from teeth the size of mizzenmasts, it says,

Spaw!! Braaaaaap!!

and hundreds of recreating folks scream and rush to shore.

Dripping muck and seaweed, the thing waddles to shore.

The first Vegemite has returned.