He's actually one of the mosasaurus in his real form but he insisted to have two legs and his size to be of humanoid. He got scars from being attacked by whalers in the past and he rather keeps them as his symbolism. He's nice but uh... a bit depressing since he lives all alone in the abyss for millions of years.

Wadda asked regarding his height since he's slightly shorter than Old but he said that he just hated to be called 'ancient'.