An RPG where you can become a type of Sea Monster and encounter human ships. Pirates are scattered across the waters. Here are what each type of monster can do:

An Aspidochelone is a giant turtle with an island on its back.
A Hybrid Kraken, is a kraken with a more human body shape and can talk.
A Kraken is a huge squid.
A Leviathan is a huge serpent with sharp teeth and fins.
A Megalodon is a huge shark.
A Siren is a huge mermaid, but evil.