Tristram Maurer

Tristram Maurer is a fictional sea monster and a recurring character featured in comic books published by DC Comics. He is associated with the Aquaman line of titles and first appeared in Aquaman, Volume 8 #52 in November, 2019.

Biography
Tristram Maurer took the appearance of an elderly human male, but possessed the ability to transform into a giant sea monster. He was known to stalk the area surrounding the Curry lighthouse in Amnesty Bay, Maine.

When Black Manta came to Amnesty Bay armed with the Mecha Manta power armor, Tristram Maurer eschewed his human guise, and shifted into his full monstrous form to fight Black Manta.