Hatchan

Hatchan, nicknamed "Hachi" by most characters, is an octopus fishman, a former officer of the Arlong Pirates, and a member of the Sun Pirates before that.

After the rest of the Arlong Pirates were arrested, Hatchan was the sole escapee, and underwent many adventures which ended in him opening a floating takoyaki restaurant and meeting up again with the Straw Hat Pirates.

He was one of the major antagonists of the Arlong Park Arc. Later, along with Keimi, he is one of the main supporting characters for both the Sabaody Archipelago and Fishman Island Arcs.