The last deck profile I did was kinda long (at least by my standards). I will get straight to it with this one.
The fishborgs, along with most of the main deck monsters, have ways of bringing back themselves or others, hence why I call this a recursion themed deck. The spells and traps support the low level water monsters with more recursion and protection, as well as some removal to fully benefit from effects that bring monsters back. The extra deck is where you will see the monsters that are actually threatening to your opponent, with monsters like Gishilnodon able to make serious dents if left unchecked. Lastly, aero shark can make use of the fishborg monsters banishing themselves, along with the other cards banishing your monsters, in order to inflict some mildly irritating burn (this should not be your primary game plan, it is more of a side option).
So that's it. There may be some room for improvement, so feel free to let me know what could be changed. Adios, nerds.