A idea for a endgame leviathan

I recently saw this gargantuan leviathan picture (Linked Here), and i thought it would be a cool deepsea/endgame leviathan

it would be nice to have gargantuan leviathan in sub 2 as a lore thing if you go too deep

Why would the Gargantuan Leviathan be there? It’s a completely different planet.

maby it grows so big because of the korrah desease that seemes to be a major part of subnautica 1 and to my understanding also a big part of subnautica 2 (The Hives)