Hebi Hebi no Mi: Model, Leviathan

The Hebi Hebi no Mi: Model,Leviathan is a mythical zoan devil that allows the user to become the monster of the sea Leviathen It was "eaten" By Alexander D. Rose's Sword Seikatsu

Strengths and Weaknesses
The Main strength of this fruit is that Seikatsu is able to transform into an full or hybrid form Leviathan which gives seikatsu great strength and speed. It is also able to create and manipulate water being a snake it also gains poisonous fangs and also gains a long tongue and tail.Another Strength is that it grants seikatsu cold proof skin. It suffers from standard devil fruit waknesses but also it may drastically weaken if separated from a large source of water for too long.