Mog is a Giant Octopus that appears in Into the Abyss.
Into The AbyssEdit
When Gray went into The Maw, he encountered Mog, who was sent by Briny and Hank to help him since he was struggling in the deep waters. However, Gray though that Mog was trying to eat him, and smacked his head. Mog was sad, but then forgave him when he heard about all of Gray's troubles.
Kind of animal: Octopus