The is arguably the most downloaded mod in the game’s history. It replaces or adds a fully playable Megalodon, complete with custom animations, a new bite radius, and a gore effect that lets you splinter smaller fish in one chomp.

The ocean is vast, but with mods, it’s yours to devour.

to play as any fish on any map, including those restricted to specific environments. Behaviors & Stats:

Some mods focus on changing or adding to the core gameplay mechanics. For example, there are mods that introduce hunger systems, making survival more challenging and realistic. Others might add new ways to interact with the environment, such as using tools or even constructing simple underwater bases. These mods can significantly alter the game's difficulty and depth, appealing to players looking for a more complex experience.

Example: The "Megalodon Mod" replaces the Mako’s model and scales its size to 20m+, adjusting hitboxes and prey consumption rates.

Console players looked at PC players—who were riding around on custom-modded Leviathans in custom maps—with envy. The developers, trying to maintain parity, had to make choices. They occasionally integrated the most popular modded creatures into the official game (officially adding the Mosasaurus and the Great White Shark to satisfy the demand), effectively "canonizing" mods.