Theory Zou and sea kings are technology devices

[Kuni samurai]

sea kings are actually technology devices that activate on shirahoshis voice.

Same for zou it is a technology that activates on momonosukes voice.

One piece is slowly turning logical with this new technology concept being added and how 800 years ago the world was very advanced compared to now.

 

[MrGorbachev]

Don't the Celestial Dragons have those snails they use to communicate with each other? Forms of sea-themed technological devices have certainly been part of the OP verse before. Interesting theories.

 

[Warchief Sanji D Goat]

Probably.

 

[NAMELESS]

Maybe they were just fish that were genetically modified and gained giant proportions.You could be on to something here.