Tansui

Tansui (タンスイ) is a member of the Macro Pirates and a former member of the Sunny Pirates. He is an arowana fishman.

Personality
He talks very open mindedly, to the ire of Macro, even to Duval himself. Unlike most other fishmen seen in the series, Tansui and the other Macro Pirates have no qualms selling other fishmen and merfolk to slavery.

Abilities
He is apparently skilled in Fishman Karate, much like Kuroobi and Capote; although his skills are never seen as he is beaten before he can use them.

Past
Tansui was seen amongst the Sunny Pirates.

Hatchan's Sea-Floor Stroll
Tansui accompanied his crew in capturing Keimi and Pappug many times, and thethey gave Hatchan a treasure map in exchange for the Keimi. However, due to Hatchan thinking the map was a fake, he returned to trash the crew's ship and rescue Keimi, resulting in the crew holding a grudge against the octopus fishman.

Sabaody Archipelago Arc
After teaming up with the Flying Fish Riders, Tansui and his crew managed to capture Hatchan, but when the Straw Hat Pirates arrived to rescue Hatchan, he sent Tansui and the other two flying with one punch each.